Here is some feedback about your tracks too man!
Coming from the XBLA as well, and being stuck with the PC version so far after moving out, it's tough to deal with such a short range of good custom tracks and so much rigged ones who always have the same flaws, really hope the PC Community will pick up when the game gets more stable ! So I really appreciate guys like you spending time and effort to provide us with some fun and challenge !
Having said that... now come what I mean as constructive feedback but who is probably gonna sound harsh sometimes. Cuz, yeah some of the stuff you do man... It's gotta change lol, it's wasting all your efforts otherwise IMO. I played tonight most of your tracks and few of them got 5 stars. Some others though, I would have -5 the **** out of them if I could just to get them out of my screen !

Which sucks because they all have potential and it's just a matter of common sense. I feel like it's the same for so many other creators out there, so sorry but I'm gonna dump it all on you
Ok so here we go :
Mashup Metal, very good, feels like more testing has been put into it than some others. 5 stars.
Marmoth is one of my favorite as well, I gave it 5 stars. As pointed out before though, it's kinda scary that you think it's definitely not a ninja. Anything with jump + landing on an incline forcing you to do a reverse wheelie makes it ninja already, so does the fender hook technique. If you dont master the technique for those, which is not teached in the main game hardest tracks, you're screwed.. But other than that, really good and not too gimmicky. Same thing for
the Wall despite that out of the blue front-wheel only obstacle that fits neither the theme or the average difficulty of the track.
Ninja Delay is an awful track. That whole "stay in the red platform for a while" doesn't work at all cuz of its design. First of all, there is no sign or anything explaining you about it, you pretty much have to guess or watch a replay if available to figure out the first obstacle. And it doesn't even achieve what you were aiming for because the planks are too large and you can just lay on them with your two wheels or wait "under them" as shown in my replay. But what killed it for me despite it feeling very cheesy was that last obstacle. Putting TNT boxes that, instead of exploding, just trigger a random crash zone above it is one of the most lazy and deceiving designs I've seen a while.. It just feels like you didn't bother making the visual and the action match and take the 2 minutes to learn or implement the exploding TNT function of the editor. An if you don't bother making your bombs explode, why should we bother playing your map ? so 1 star for all those reasons. Just like a certain game : not polished enough to be release in its current state
Pure Concrete could be (or is) a good technical map without that awful back wheel incline obstacle. Why awful ? Not just cuz its cheezy but because of that dumb concrete (0:40 on the video) popping out in front of us and blocking our view of the action. Putting **** in front of the screen and hiding the rider to increase difficulty is NEVER a good idea. It's not fun. It's not fair. It's not truly challenging our skills. It's ********. Ruining any map IMO. So anyway, i still go through with it and get past it after raging. And just when I'm about to get through with it and get to the flat part, OUT OF NOWHERE, there is an almost invisible smallish bump (0:52) on the edge of the concrete that screw your balance and makes you fall again. Really ? Next
Remix 2 should not even exist. I liked the first one though. I mean, the beginning is okay and fun. Then you make a jump above some stuff and hear that you skipped a checkpoint, at this point its more like "whatever, not great design but not an issue as far as playing the track". And then you get to that front-wheel obstacle... THIS OBSTACLE is so ridiculous and so luck-based that it's almost impossible. I have no idea how Ikki made it in his run but I suggest you all to watch the replay, its impressive

. That's not level 5, that's level ******** at this point

And it also makes it obvious that you didn't test it at all and that probably you made an obstacle that you don't have the skill level to pass or to get a strong understanding of its consistency and difficulty... So , end of track here for me, I'm never gonna bother put time and effort to somehow beat that obstacle, it's not rewarding at all and feels dumb compare to the rest of the track.
So, yeah, that's my main beef with your creative process in general, maybe some have a different opinion but mine is the following :
People should try to make tracks that are around their skill level !
It's always the same abnoxious feeling. You playing a map and it's all going well and then, you notice all of the sudden that out-of nowhere weird raw obstacle. And of course, you press start to watch the leaderboards, and the map creator is not even there to show you the way to do it, if there is one.. Which means no testing, no well-balanced obstacle and probably no fun at all. Cuz if you had play that front-wheel obstacle, you would know for sure that it's not good and impossible to pass with consistance. If you feel like a ninja level 2, give us some awesome ninja level 2 tracks then man
Make it fair
-Checkpoints between obstacles : what's the point of making a really hard obstacle, make the player feel good about getting through, make him keep going for a while with no checkpoint and then make him crash with a weird surface or glitch or box, to have him start all over again ? It's no good for the trackmaker and no good for its players IMO.
- Always keep the rider and the bike visible especially during a tricky part !
- No more impossible front-wheel obstacles like the one in remix 2 please, or only if you can pass it yourself !
Ok that's it. As you notice, your last work is my favorite (Ninja delay except) and I wouldn't write long messages like that if I didn't feel they could help you get rid of small stuff that do a lot of harm IMO. So I hope you take it the right way, and I'll be the first one to check out your future stuff for sure
Peace