Update

- Fixed somes bugs in World 2 level 1 (the train) and some performances issues in it

- Fixed some (hopefully all) of the crashes

- added a little animation on the leaderboard

- changed achievements description

- added some signs in the firsts non euclidean levels (World 1 level 1 and 3)

- tweaked the levels available in the demo, now it starts with world 1 level 3 instead of world 1 level 1