In-game controls

Right, Left	Moves selected worm in respective direction
Up, Down	Adjusts aim for selected weapon in respective direction
Spacebar	Fires or activates selected weapon
Tab	Selects next worm on team when Worm Select is active
Enter	Causes selected worm to perform a forward jump
Enter, Enter	Causes selected worm to perform a backjump
Backspace	Causes selected worm to jump vertically
Backspace, Backspace	Causes selected worm to perform a backflip
Backspace, Enter	Causes selected worm to perform a backjump
Backspace, Backspace, Enter	Causes selected worm to perform a small backflip (identical to backjump in all but animation)
F1 - F12	Cycle through available weapons in weapon groups when selecting a weapon
` or ~	Cycles through available utilities
Pause/Break	Takes a screenshot (saved in Capture folder)
Insert	Cycles background graphics
Home	Centres view on active worm
Page Down/Page Up	Reveals/hides chat window respectively
Delete	Cycle through above-worm information displays
Alt + Delete	Toggle opacity of above-worm information displays
Shift + Delete	Toggles autohide for team status bar
T	Displays thought bubble above selected worm
S	Replays the last shot (when pressed immediately afterwards). Hold down shift and press a number key from 2 to 0 (along the top of the keyboard) to slow down the replay, or press a number key without shift to speed it up. Press S repeatedly to advance frame by frame; press Spacebar to fastforward the replay to the end.

Some keys have specific purposes when using specific weapons and tools. These are listed on the respective weapon pages which can be found from here.

Key	Purpose
Right, Left	Moves selected worm in respective direction
Up, Down	Adjusts aim for selected weapon in respective direction
Spacebar	Fires or activates selected weapon
Tab	Selects next worm on team when Worm Select is active
Enter	Causes selected worm to perform a forward jump
Enter, Enter	Causes selected worm to perform a backjump
Backspace	Causes selected worm to jump vertically
Backspace, Backspace	Causes selected worm to perform a backflip
Backspace, Enter	Causes selected worm to perform a backjump
Backspace, Backspace, Enter	Causes selected worm to perform a small backflip (identical to backjump in all but animation)
F1 - F12	Cycle through available weapons in weapon groups when selecting a weapon
` or ~	Cycles through available utilities
Pause/Break	Takes a screenshot (saved in Capture folder)
Insert	Cycles background graphics
Home	Centres view on active worm
Page Down/Page Up	Reveals/hides chat window respectively
Delete	Cycle through above-worm information displays
Alt + Delete	Toggle opacity of above-worm information displays
Shift + Delete	Toggles autohide for team status bar
T	Displays thought bubble above selected worm
S	Replays the last shot (when pressed immediately afterwards). Hold down shift and press a number key from 2 to 0 (along the top of the keyboard) to slow down the replay, or press a number key without shift to speed it up. Press S repeatedly to advance frame by frame; press Spacebar to fastforward the replay to the end.