I play on GBA version and I noticed if I press Up, the gems down faster. A friend told me its not possible to made this on arcade Version. I suggest to separate gba version in other leaderboard to be more fair.

What references for catch full damage?

I think its cool to add a route on the run (optional) and a filter to leaderboards, like: Icefull-Waterfull, C5, E3, C3... But I don't know how hard to do this because we have a lot of runs and its not the main leaderboard.... but its my suggestion I think it would help a lot to find other runs with the same routes.

Can I change damage level and game speed on option to run? I think de rules no specify this...