Here's a level I created:
For the hard badge: follow AioriaRox's guide, but for the $5000 budget: here's an easier way.
The Plank Mark II,
7 Fuel, 4 Ramp Length, 3 Ramp Heighth.
Aim the ramp a bit down from the usual, use your firework rocket to get up pretty far, try not to reach red zone speed, after the boost is done, get about 140-150 speed(try to not go too less speed, but not reach the red zone) and try to angle yourself to keep this.
Also, it might not work at first, but the bonus shop can help. ALOT
how do i do level 15 i think it is glitched because when trying to do it i quit to menu and other things several times then i looked it up on the walkthrough it says go to menu and back into the level but it stays same level and it doesnt work =(
wtf bug found in level 7 i shot two portals on the moving platform but with one its sending me to the wrong side.
and i was wrong, its not just setting the characters position, also the x speed and y speed things.
for all those people who think it was hard to program the portals, only the placement is a little bit hard, but for the rest its just setting the character's x and y position to the same as the other portal =S