Quick update: I used the two games you mentioned to optimize the emulator, and 0.1.4 runs both better:
- Pico World Race: about 8 → 15 fps. It's still heavy and plays at roughly half speed, but it's much more playable. Tip: B accelerates, A brakes.
- Breakout Hero: now around 28 fps, with fewer hitches when bricks explode.
Both are built in now. Let me know how the other games you try run!