I must say, this is a very, very fun and unique game that really gets you craving to just complete this bit or that bit otherwise I won't be able to sleep tonight. I love it and it is most certainly a different pace from other trials games like Ubisoft's Trials. If you tried to play this like one of those games, you'd get no where.
I appreciate the amount of work put in to make this, and congratulate you on such a game. I am excited to see where this goes and try out new techniques to pull off on new tracks.
I submitted the survey, and overall, I'd give this a 8/10 (excluding the graphics as they're not final). The gameplay is mostly intuitive and adds to the feeling of controlling and actual trials bike.
I played with a controller and highly recommend anyone else playing to play with one too. Controllers seem to be made to play for these kinds of games. This is going in my top trials games and really want to see it in 3D in the future!
Best of luck.
(Also, just a note, at times I was getting frame drops to the sub 10s for a few milliseconds then it going back to ~60 fps. This disrupted the flow a little, but not massively as the times when the frames dropped, it wasn't a very important part. Just wanted to point that out.)