This is a very fun mechanic to play with, and I feel like it needs a very obvious sequel blocky triangle, the movement system is very satisfying, The simple flat colour box feel is great and makes the game that much more enjoyable.
There's nothing I can add that others haven't already specified. Keep going with this, I can see it being a very addictive hypercasual game that'd run nicely on both pc and mobile. With some sort of leaderboard where you could compare your progress to friends, mix with more levels. Definitely a game that I would pay for. :D