RoperSkills's Comments

An easy way to go 150 Mph is to Upgrade the Ramp Height all the way, Acceleration 2 away from max, and then get the Air Resistance to at least 3 away from max. You'll also need at least two rockets and maxed Glider. A bunch of fuel is recommended but you don't need more than about 4 from max. Once you have all the upgrades, launch yourself going diagonally upwards at about a 45 degree angle and use your rockets to get to maximum height. Once you reach as high as you can, dive downwards and you'll easily pass 150 mph. It probably sounds complicated, but just trying to help. ;)