I like the idea, a pity that the UI didn't fit in the 64x64!
Thanks for playing and for the honest note! You're right — the play field is a true 64x64 but I pushed the score/combo HUD into the border rather than overlaying it, since at 64px a readable number would have eaten most of the screen. A fair trade-off to wrestle with. If you get another run in, chasing the graze combo (skim a rock without hitting it) is where the game really opens up. Cheers!