I felt the keyboard layout was kind of odd, but the control and adjustments to the character were pretty good. Right from the menu, I was really into the sound design, complimented well by the in game art.

Would you believe I won. :)

I think the 4th level pulls itself off as a puzzle platformer fairly well. However the spawn-in time when you die is too long, breaks up the rhythm.

Remember to vote for https://itch.io/jam/heartjam/rate/238884

This was fun. Controls are a bit confusing, perhaps you can set it to something like Q(Jump Boost), A(Jump), W(Dash Boost), S(Dash).