Really great submission! Love the visuals - creates a fun atmosphere/vibe.
I like the concept of the storm cloud acting like a timer for the level, but there were times when it got in the way of me seeing the character.
I completely missed that you can upgrade your equipment until I found it impossible to close a gap in the 4th or 5th level. Making it more obvious that you can upgrade your equipment could help here (Ideas to play around with could be: flashing/animated upgrade icon when you have enough bolts to upgrade something, prompt to upgrade at the start/end of each level, etc.).
Nice job putting this together in a week - well done!