Here's a list of what I would improve:
- the movement speed is WAAAAAY too fast
- the explosions feel as if they will randomly either be above of below you and I had no way of telling which would happen, my strategy was to move back and forth to ascend
- I see no point for the level up system
- "Eplosiors". Let that sink in.
Well, that's my dose of criticism for the day. Great job on finishing a project!