нєℓℓσ. ι αм ωαям_тωιg, αη∂ ι ρяєѕєηт тσ уσυ... υℓтιмαтє α ρℓαтƒσямєя ℓєνєℓ ¢яєαтσя Click to set where the player spawns. P to play your level, B to continue making it. Arrow keys in build mode to move where you are going to build. Arrow keys in play mode to move the square character. Number keys to switch tool. Space to build. R to reset.
Idea from @Stratfordjames All art and code by me. Not that the art is good at all...