Also, it seems important for the game to quantize input. I.e. right now you can occupy a continuous height anywhere from "0.0 to 1.0", but it would be much more fun if the game would automatically snap your height to either "bottom, middle, or top." It's quite frustrating to lose because you just barely clip a gate.
I'm confident that I didn't move the ship because I used the arrow keys and positioned myself well before reaching the first gate. I was close enough to missing the opening that I would understand hitting the first gate, but hitting the second gate is uniquely frustrating.
Failing because I wasn't quick enough can be fun. Failing because your overly-clever graphics engine requires me to distinguish "fog" from "glass in fog" in 0.5 seconds is never fun.