GO TO THIS TURBOWARP LINK: https://experiments.turbowarp.org/pointerlock/1052892116 in turbowarp click green flag and click screen, WS or up and down arrow keys to move, A and D to rotate as well as POINTER, left and right arrow keys to strafe, space to jump over small enemies, collect stars. click m for map, yellow is star, orange is small enemy, big green is big enemy. 4 RES recommended.
thanks to griffpatch to making the 3d Ray casting tutorial.