I'm not really a fan of these types of games but it does a good job at being what it aims to be. I managed to get through with almost 50 deaths but I was rushing and being careless at several points. The graphics are decent but could be improved and I don't see what this has to do with the jam theme. You do 'climb' up on certain levels but on others like the disappearing block hill you go down.
Regardless, this is a solid entry. Good job! :)