Made a video of my preferred way of leveling IA and S: IA: This is a small trick of leveling up Instant Accel and S: Instant Accel where you'll be able to skip the minigame each time (making the process faster and less annoying). The trick is to simply jump at the same time as (or immediately after) IA triggers. This is difficult to do by reaction, but IA always triggers the same time after any jump, so if you find the correct rhythm, then it becomes reliable to do. Same trick also works with S: IA. The second IA always triggers the same time after the first one, so again, it's all about finding the right rhythm for jumping. You can also do this for Sprint, but Sprint requires no timing whatsoever. You can mash jump continuously and that's enough to skip the minigame for Sprint.