Controls: WASD or arrow keys to move. F to equip Q to unequip G to open and close the map Click or space bar while gun is equipped to shoot (though clicking to shoot does cause lag; see details in notes and credits) B to switch the bullet type R to reload
For whatever reason, clicking within the project to shoot creates 1 or 2 seconds of lag. For equally weird reasons, clicking outside the project (as in anywhere besides the game window) will not create this lag.