I really felt for our cube protagonist ( we shall call him John). John was a pink cube in a purple cubes world so i get why he was rushing for freedom. I mean purple world is scary and comes with all sorts of purple based traps!
One thing i did notice is if you dropped down from a ledge onto the spikes you just sort of went across them as if they were a platform, so i'm not sure if the collision is only activated on the side of the spikes.
A bit of music would have really helped John i think to find his way too!
Overall a nice game with enjoyable colors and a strong protagonist!