Seems to be a bug with ramps, can't walk up on the start of the ramp, or rather at any point where the ramp tile begins. So the character will stop walking up the ramp seemingly randomly.
Clarity between what is or isn't a pitfall would be nice - having the tricked pitfalls felt cheap and not enjoyable to restart the level because of that (mainly the one with torches leading down into a pitfall).
The spikes on the sides of the platforms felt bugged? At least with its detection, felt I shouldn't have died when the spikes did not collide with me.
Movement feels good, but would like to see some other mechanic other than just jumping to feel more interactive.
Music and atmosphere were good.