Buggy.
fun idea but it was immesurably frustrating because of these reasons:
1 around half way the blocks fall on your head pushing you done and drowing you making it so frustrating i quit
2. powerups where useless they didnt really help at all
3 when i got around half way i teleported and it glitched out and made my charachter move constantly too the left and i couldnt move it back, resulting in my character drowing again.
4 at around the 50-75% mark the blocks dissapeared all together and left me to drown
in all this was a good idea but you obviously got pretty lousy with the programming.