Bugs:
(unsure if intentional) wall jumps can be abused to jump over walls by simultaneously holding the jump and movement keys. (If intentional, this makes the platforms unnecessary).
Strengths:
Wall-jump mechanic makes the game more interesting, the colour-scheme used contrasts a lot and makes the game pop-out
Weaknesses:
There isn't a clear goal, you can progress through the level but there isn't much you can do after that (maybe give the character a win condition e.g. collecting something?), the shading details in the platforms are slightly chunky in that you can visually see each layer of shade rather than it being a continuous gradient (maybe you could blur the edges of each layer to make each colour gradually phase into the next). No sound. Other than obstacles there isn't much for the player to overcome
Changes or improvements:
Add a win-condition for the player, possibly add enemies to further increase the challenge for the player.