Two buttons: "jetpack" and "fire". That's all you need.
The background shader in WebGL may be a bit challenging if you have an older computer.
Written in JavaScript + WebGL, with help from p2.js, lodash, gl-matrix, and bezier-easing. Currently tested and known to work on Chrome, Firefox, and Safari.
Really neat game. The bouncing geometry gave it a fluid feeling unlike a lot of other runners where stuff just disappears.
Although I didn't really notice a marked increase in difficulty I was up to a good 100,000 points and full shield and powerups all over, so I could probably play forever.
I really liked getting different powerups. The homing missles were my favorite, the starter gun seemed unhelpful. Some basic bfxr sounds would bring it to life better.
Physics on enemies was neat. This was much much easier than I was initially expecting from the first minute or so due to plentiful powerful powerups. I had a good time though. =)
There was a fun core here but I felt the lack of sound effects and a visible jetpack. I enjoyed the crazy background and the icon-style graphics, though. Nice touch clearly showing when I got hit, and the skull is a cool tradeoff.
Fun shooter! It did run very slowly on my machine though which mars my experience. Must be the backgrounds. I like the randomly generated level. I think a different die animation for the enemies would make killing them more satisfying.
Jetpack in the title and it being a 2D side scroller had me expecting something like Jetpack Joyride, and to your credit it really isn't.