Hold the rim. Enemies climb out of the arena's depths — blast them down their lanes.
P1: A/D move along rim · Space fire · S/L-Shift Prism Burst
P2: ←/→ move · Enter fire · ↓/R-Shift Prism Burst
Solo: either set works · P/Esc pause · M mute · Q quality
Touch: touch near the rim to slide there (auto-fire) · tap the BURST circle for Prism Burst
Dodge spikes while warping between arenas!
↻ Turn your phone sideways for the best view