Fun game :) love the chip tunes music, especially level 3!! Also love the character design. The game felt like a throwback to Jazz Jackrabbit a little bit which felt really nostalgic!
Be careful with full screen flashes when you get the powerups. Those combined with the flickering glitches in the underwater section of level 2 kind of strained my eyes (around 4:05 in my video), and could also be triggering to people with epilepsy, so it's worth considering how to reduce that risk.
I also tend to associate space bar with jump so I had a bit of trouble with the keyboard layout. No problem, though! It prompted me to remap my controller to your keys using AntiMicroX and played it that way. Controls felt great with D-Pad and A/B buttons, although the friction was a little slippery sometimes.
Overall everything was really great and I had a fun time playing!! I like the double jump effect and also how the resources are limited, it makes you really consider when and where to use it. Nice work! Here is my playthrough: