Exactly my sort of game, except the controls are just very unintuitive to me. Can I suggest an alternative?
- X+left/right swaps what block you're holding.
- X+up/down stores what's in your hand or takes it back out.
- Tapping X rotates.
- Circle (Z) places or picks up a block. Placing a block automatically takes out a new one.
(Circle is usually taken as "accept" or "main action" in Pico-8, isn't it? I would suggest at least swapping which is which.)
Part of the idea of this is that there is rarely a case where I want to open storage but not take something out or put something in.