Is there a manual for this game somewhere? I have no idea how to accomplish challenges. And the complete instructions for this game appears to be 'complete challenges get starts unlock levels'. Then there are hints on the loading screens, I think there are hints but the loading screens appear for only half a second so are completely useless.

To make it more concrete. I am now stuck on a doom raiders level. One time I accidentally got under the par time of 22 seconds, but I have no idea what I did to do that. What affects the speed (yes I know A for boost and X for jump, but I do that already on every try).

Anyway, apparently the 22 seconds was not even the goal, the goal is to keep a combo going??? But what keeps the combo going. Is it even related to the lane switching. By randomly trying everything, I noticed that keeping LB pressed during the whole scene does something to keep the combo going longer. No idea why, just keep LB pressed and something randomly does something. But it's not enough to keep the combo going until the end. Played the level 100 times now, still no closer to finding out what breaks the combo on that bl**dy level.