Fun base game but as others have already stated the game would greatly benefit from some sound effects or music to keep players hooked on it and it also could lean into adding a sense of rhythm to the level structure if you wanted to. A score/highscore system as well would go a long way to keep players coming back to try and beat their previous records.

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! 

The game has a good premise, and has been executed quite well. My only comment is that I wish there was some sound effects.

This was quite well designed! I'd recommend you make the hit detection of the spikes a bit smaller as I was getting restarts even though I missed the spikes :)

Good job! As well as the things other commenters have mentioned some sound effects and a proper end screen when you get to the end might be nice!

Good concept. There was a nice progression in difficulty. It would have been nice to hold space and have the character continuously jump. Nice game.

I like the colours used and the difficulty of the game.

A thing to add for me would be maybe a death counter or an option to continuously jump by holding space.