@JoeySkywalker
Because:
The fact that the game is unfinished does not mean that what there is is necessarily lower quality, just that there is less of it. If I had waited I wouldn't have been able to point out the time-frame it was made in. And once you can beat the levels they become easier forever, so time spent in this version is transferable to the next, in a way. But mostly because I just liked the idea of people playing and having fun!
Oh, and also because I am impatient.