I really liked this game! I nice twist to the good ol' Getting Over It. I personally never played Getting Over It before, so this game was quite tuff xD. The art in this game was really good, I liked the simplicity of it; as well as the post-processing done was great. The sound design and music of this game were clever, really fitted the atmosphere. I liked the idea that was implemented, instead of going all the way done, it will be easier to climb.
I suggest, to improve this game, making the cursor clearer. It was really hard to see the cursor so I wasn't sure where I was swinging my pickaxe.
Overall this game was great, I liked it a lot!
Great Job!