This is a simple 3D project on scratch using RayCasting! FOV is how wide the player can see. The player's normal FOV is 60, however you can adjust it to however much you want. Resolution is how detailed it is. Low resolution may result in less lag, but there will be lower graphics. The recommended resolution is 5. Mapon is basically a slider to enable or disable the map and player. 1 is enable and 0 is disable. It is usually disabled.
If you want, you can remix and click the sprite saying "Edit me" to configure the map.