Pretty cute and fun game, I don't know if it is the engine (cause I never heard of PICO-8) but the arrow keys where so small that at first I didn't know which buttons I needed to press on the battle and I just started randomly pressing all buttons until it worked lol, but I loved the graphics and vibes, looking forward to see a more complete version in the future :)
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Actually, the whole reason that there are 4 lines of arrows instead of one is that I couldn't think of an arrow symbol that would be readable at different speeds on PICO-8
PICO-8 is a fun little platform that works like a retro computer without the hardware. It's like an emulator for a console that never existed, hence the term "fantasy console." It's very fun to prototype and make small games for it!