Not bad at all. The animations are cute and I like the minimalist style. As for the rest, I'd say it's not to my taste:
The level design is what makes this game difficult. There's fun-hard and tedious-hard... and this one is tedious for me. Restarting a level because I fell on a saw I couldn't see is not fun for me. (eg: I jumped to the right not knowing if there was even a platform or not, this to fall on a saw.)
I generally like high jumps but here, it's a bit too high: we even can't see the ground.
Maybe zooming out would resolve these issues?
Keys: I think there's no need of 2 different keys to pick up and shoot, why not simply pick up automatically? Also, I would suggest to avoid all system keys (Ctrl, Alt, Shift) as they can often already be custom assigned.
But props for trying to create something original in the limits of a platformer, and I assume all from scratch!
EDIT AFTER REPLY: Wow, that was fast! Much much better now. GJ & thanks! :)