Hey I came up with mostly the same mechanic. I think it would be a little more playable if you gave more stamina and with faster momentum gain. Still cool for an first time though.
I noticed when I played yours! I wish we could have figured out how to mechanically limit our characters jumps without a literal stamina bar.
I applied more gravity for every second you are in the air as the mechanic. But a stamina bar can work too if you implement it well!
