Congrats on your first entry!
Awesome opening cinematic - explains the plot and game premise well, I like it much better than a description under the game. Well done! If there was some audio, it would be even better.
Impressive amount of content, with so many levels - even the tutorial level was quite long. I would maybe cut down the amount of content and focus more on polishing - especially adding some sound effects and background music.
On level 1 I encountered some invisible walls - I think that was some enemy, as I was killed when standing on it. I think that was a bug (as in an insect, but also a game bug :D).
Cheers!