Hey, great work on your first game! The concept is really cool and I think it's a very creative solution, but as astroindie has mentioned, it's currently really hard to gauge your jumps. Having a marker or any sort of more analogue feedback would definitely help a lot alongside the charging effect on the character. Adding feedbacks helps a lot when trying to teach the player about the mechanics and also as a small visual/audio reward for simply interacting with your systems.

It really gets easier over time, but it's always a good opportunity to challenge yourself as well. Keep on going, looking forward to your next project!

I like the idea of using a character's moveset to solve a puzzle, and then using that same moveset to complete a combat encounter! I also think the mechanic of jumping a distance based on how far you hold space could be fun, but the fact that the animation is desynced makes it really hard to judge 3-long jumps. I think that it was a missed opportunity that the you always are only allowed to move to one specific space of the board- the combat level to me feels like a level where it would be easier to play with the idea of using your movement system dynamically to avoid obstacles (I am aware that the fire doesn't actually kill you in that level, I am pretending that it does for the sake of the playtest). I think that this game would definitely benefit from some audio and additional animations, it's crazy how much they impact a game, especially in a game jam.
It's cool to see that you've released your first game! Things get way easier after your first few games. I hope that you join next year too! (no pressure though)