This may "run" on a 3GS, but it really doesnt work. Its always super choppy, the acceleration seems to drastically and erratically change, shield often refuses to activate, player ship keeps rising after you let go of the screen, etc. Combine this with levels that make bullet hell shooters seem tame and wonky handling more fit for Tiny Wings than Jetpack Joyride and the result just isnt viable as a game. Maybe better at more than 10fps...
DojoMojoMofo about Wave Trip, v1.4.1