Very cool and polished game! Definetly a challenge because of the 2 button limitation. Because of that, it happened quite often that i wanted to turn to the other way around and instead pressed ok with the left arrow. Apart from this 2 button limitation, having it be played with all 4 arrow keys, one for each direction, and space or similar to press okay, would make it a bit more intuitive maybe. This would ofc result in less challenging controls, making space for additional challenging mechanics to add! But that's just some ideas, your game is great!