The idea is a perfect fit for this Jam!
With that being said have some criticism.
First of all the movement feels way too floaty and maybe a bit too fast, the jump also feels very inconsistent since it seems like running up ramps boosts the jump height.
The spikes that kill you around the stage are also very hard to notice and 80% of the time i died to them without really noticing they were there, since they blend in with the background and don't stand out.
If you iron out those things and maybe expand it with a few more actions then i think you will have a solid game, good job!