Let's trade feedback! I submitted a project too.
- Art Style: Perfect for Game Boy! I can see this on a classic handhelds, SNES and PICO-8. With some customizations here and there I think you could aim to refine it for the newer crank PlayDate models.
- Mechanics: Reminds me of Missile Command both in style and bomb-dropping. I didn't discover the missile bomb feature until very late into the game. I HIGHLY recommend adding a tutorial or a super easier level 1 to easy the player into map exploration, protecting their ship and seeing the pace of enemies.
- Interface: GLAD you added an in-screen pause button. Helps in accessibility given how fast paced the enemies can get over time. The Shop text is readable, though it could use better icons that express what the ability is you're buying with the sun-coins.
Recommendations:
- Please add a Tutorial. An easy level 1 to let players get used to controls and protecting their ship from a few enemies.
- Add WASD or Arrows movement. It will help with accessibility for those without a mouse. There were moments I just wanted to run around your map and dodge enemies manually with my arrows instead of the mouse.
- Add more interactables to the Map. I wasn't as concerned with my ship. I wanted to explore more map. You can add maybe civilians that you run into that earn you more points if they get into the ship safely. (Like Resogun). You can add traps or hazards that delay movement speed for a moment. (Like sand, sludge, rocky terrain or spikes). You could add NPCs that start attacking the other enemies or allies with shields that take a hit for your ship----that'd be nice shop item. Interactables will help keep player interest and make your world more dynamic.