I think all the neg feedback is a bit harsh, quite a simple game, i love the music :D, a good concept but kinda samey after a few plays (im a nub took me a few goes to beat the boss with my laggy laptop arite :P)
lvl 1: glitch if you keep running forward you kinda get taken above the blocks, run on air til end of track and jump - you go down and win
lvl 2: safe spot on far right (i got squashed once playin the level about 8 times)
lvl 3: jump on spot and move when you see light come up
lvl4: just about timing really...