Thanks for the constructive feedback! Glad that you enjoyed the basic mechanics.
I can definitely see how the second level might not be too intuitive, we definitely should have spent some time playtesting the game with someone who wasn't familiar going in! As you probably can sympathize with, when you've built the game from scratch sometimes you can kinda forget what is and isn't going to be obvious for a new player.
The trick is -- the faster your mech is going, the higher you jump. So you want to catch the speed from the ramp and charge your jump immediately. This will give you the height you need! However, there is another trick you'll have to actually land on the platform.