very cool game! i played it for an hour or two and even managed to win :)
i like the mouseover highlighting of red & green. the lock mechanic is really neat too. and the core minesweeper-ish mechanic is super engaging.
i didn't really mind having to figure out how the game works, but other people might feel differently.
i did find a couple bugs (or what appeared to be bugs), but they didn't really hurt my enjoyment of the game:
there's a bug (i assume) in that you can use the telescope multiple times when you get it.
there's a square you can hit that makes the locks go away? but it looks like a regular square both before and after you click it?
so yeah, just some stuff to look into if you feel like it. but i think it's super fun as-is. thanks for making it! :D