Hi, so I played through the game and does have some serious issues.
If we imagine that this game actually conforms to the rules, then the grid size must be in the range 10-20cm. There’s no absolute minimum size for a grid but when we are talking human-sized protagonist anything smaller than 1m is probably gonna have a really really good reason why it is so small. In general it is a really bad idea to ask the physics system to move the character around, and instead use tweening to move the player character from per-deterimined grid positions to next position.
I also don’t see any attempt at implementing the theme. What you describe is anachronism and while retro-futurism perhaps necessarily is anachronistic, putting a modern tool back in time is not retro-futurism. Neither is retro vibes.
Play-through with more comments: