• L button: aim without walking
• R button: charge weapon (after upgrading)
• D-pad: walk, aim up/down, hold up to interact or enter doors/ship
• A button: jump / confirm
• B button: fire weapon
• Start: Open pawsOS (map, inventory and other screens)
• Select: Switch between weapon modes (after upgrading)

Top secret: Hold Select for 2 seconds to warp back to your ship at any time.

The Evercade version uses a modified version of the GBA rom and uses the same controls as the GBA version, but A & B are officially labelled the other way around (Xbox style layout instead of Nintendo style layout).

The only true difference is the title menu uses the opposite confirm/cancel to match Evercade's UI (you may need to update your evercade firmware to see this adjustment).