I posted these tips in Discord the other day, see if any of this helps!
- You do need to be close to your wifi point as the Playdate's wifi radio seems pretty weak.
- I've found that resetting my router/access point sometimes helps
- You could try fully restarting the PD (Settings->Restart Playdate)
- Failing all that, if you're able to connect your PD to a PC with the simulator running (simulator comes with the SDK) you can see the console logs for the game, might be something in there.
- You could try renaming your save game and creating a new character to see if that helps. Again, only if you can connect your PD to a computer, but go into data disk mode and find the com.garethiw.pq folder and rename it. The game will then boot up as if it was a fresh start. If that works, I can help you get your character back if you want to.