I like the use of contrast in the tile set, the important areas (ground, spikes, etc.) all are quite bright for clarity. The spinning spike ball looks great too, the staggered animation spacing really helps it feel dangerous.

I think your character would come alive a bit more if you made them a smidge less rigid, their body is very vertical during all actions, and the arm being directly in line with their back while standing flattens their shape quite a bit. 

I like the tile set a bunch!

I have a feeling that the cat has a goat beard? 0_o