Overall, very fun. The (non stock) graphics reminded me of an old gamemaker game while the music was top notch.
The jetpack meter was FAR too small, put it on the top like the health bar!
The ground movement was too slippery, I had quite a few cheap deaths due to not being able to position my character properly.
I also didn't like how you couldn't hit the blocks on the ground without a bomb.
Otherwise good!