Keyboard: `A/D` move, `W` jump, `S` duck/use, `↑/↓` aim, `Space` fire, `E` swap, `1-3` select.

Mouse: `A/D` move, `W` jump, `S` duck/use, mouse aim, click/`Space` fire, `E` swap, `1-3` select.

Touch: left stick move+aim, right fire circle, jump/duck arrows, tap weapon icons in HUD.