I am locked at level 12 because when i finished to discover all objects and animals, that is saying that i need some more clues. Please patch this bug :(
The 28th level is really good, just when you click a wrong button you restart all from the start (on the level). Please make sure you can undo your action if you push a wrong button. Please.
For the 150 mph : The components : Get the 2nd rocket, get the 2nd flight, upgrade all your acceleration and your ramp height. The map : Go on the 35' or 50' ramp, when started, go as high as you can and when you're to the maximum, hold space and go down. Hope it helped.