Im trying to get the game but I see no option to buy it in anyway

I am trying to beat the highest level of the Annex collection and the last platform requires a tight slide jump to complete. I can do a slide jump if I have time to run and I can mostly get horizontal distance and not much vertical distance. When I try to just slide and jump quickly I end up doing a weird half jump. What am I doing wrong?...

At the start of the level, after the jump boost, there are 3 platforms in diferent heights, the first 2 are ok, but from the second to the third I can't reach it, double jump, the Q boost, i can't find what I'm doing wrong. Can someone indicate how to do the jump?...

Thanks for game btw. But unify 5 has a glitch on second path first zip doesnt working. Ive tried everything but the character is always falling. Can you fix it devs? Thanks

Im trying to shift+W+A+space but I cant speed boost to the other wall.