yeah, that is so annoying, you cant make tunnels.
Sorry if this has been mentioned, but it would be cool if you could do more things with the Inverted Impulse coaster, like Volcano the Blast Coaster, Inversions etc. But also, a rocket coaster would be cool. Like overbanks, turns etc. But in real life, you dont launch in less than one second, but if the launch was like a real life launch, like on TTD, Xcelerator etc.