This is a smart and original idea. We normally take the concept of "jumping" in videogames for granted, without asking how it impacts the player character. Also, this is an innovative use of 5 colors.
Unfortunately, I could not get very far. I just couldn't store enough energy to jump 4 cold blocks in a row, and when I tried to store it, I just burned myself up. :)
You may want to review the collision. Note that it is possible to get stuck on the corner of a tile, without being able to climb on top or jump off it.
Lastly, note that the alternate controls (A for Enter and Y for Space) did not work for me. I didn't really mind, but they should probably be removed from the instructions.