Groksteroids commands

ActionKeyboardTouch or mouse
Rotate left / rightLeft and Right arrows, or A and DThe Left and Right buttons
ThrustUp arrow or WThe Thrust button
FireSpace or J (hold to keep firing)The Fire button
HyperspaceShift, H, Down arrow or SThe Hyper button
Start or play againEnterStart game, or tap the playfield
Pause or resumeP or EscThe pause button above the playfield, or Choices → Pause
Sound on or offMChoices → Sound

The on-screen buttons react as soon as you touch them. Hold them down, use several fingers at once (for example turn, thrust and fire together), or slide a finger from one button to another.

Choices

The Choices menu stays open until you close it. It has Pause, New game, Sound, Auto-fire (keeps shooting without holding Fire) and the theme: Classic vector or Neon Starport. The game pauses by itself if you switch to another tab.

Play Groksteroids