Here's my feedback. I submitted to KenneyJam too.
- Visual: Good use of the platform pack and the industrial pack. It feels cartoony and the jumps is floaty but it works by the theme.
- Mechanics: The jump is floaty but works well here! I'd certainly add more abilities to the character or other powerups that drop. For example after each wave a power like a shield bubble could appear. Or an attractor that makes enemies fly away from you for some seconds. Or perhaps unlock a double-jump power up. It's alot of directions you could go.
- Music/Audio: These are fine. Music was clear and simple.
- Another idea: Not sure if you'll keep expanding this. But it might be interesting to try different levels with different robots. Some jump higher than others or have an ability or two. Or perhaps each robot can pertain to a different level. Like a water robot crossing underwater platforms could introduce Jellyfish enemies and environmental hazards while keeping it a platformer.