Thanks alot :D
First off: the piece-that-can't-move-somewhere is a bug that I knew about, and I assume it has to do with how I manage collision, so that pieces don't go off the board. But I couldn't afford the time to fix it, but if I do come back to it, it would certainly be on the todo list.
Second: yeah the end is not very well planned. I used the timer as a mean to end the game, either by not placing a piece in time, or because you don't have pieces that fit. Again, proposing pieces that would fit would have taken too much time (especially checking if any piece could fit anywhere on the board, considering all of the possibilities, between positions, rotations, and flips)
With three hours you can't do much, but it is a very good way to prototype stuff, and if I get back on the project someday, I would polish it out as much as possible.
Anyways, I'm happy you liked my game (btw while in dev I think I managed to get over 210 points or something, but since it was while developping the game, and I don't remember the precise score, I couldn't put it on the highscore)
(Feedback is always great to have, thanks alot :D)