a running sprite (i might still change the character design a little so it's cuter / not as brown idk) and a VERY sketchy in progress map concept for the ice caves. i'm thinking, to get into the cave, you either need an ice-melting ability that you collected previously, or you just need to collect enough music that the ice blocking the cave entrance is melted.

then when you're inside you will walk around and get by icy obstacles by melting them with your MELTING ability. at the bottom you will enter a new map which is darker/deeper and might involve sliding ice puzzles. to the right is a pit, and you can go down it but you can't move into the black area without a light! so, in the sliding ice puzzle area, you'll have to find a music note that will give you a LIGHT ability.

then when you can navigate the dark area, maybe it will be a tunnel that returns you to the surface -- but a different part of the map you couldn't access before.