After giving up on an unnamed park builder for being way too inflexbile, I found out that Planet Coaster was available for early access - and wow! Can't believe the freedom of expression. Anyway this is my first 12 hrs of playing around, a generic pirate-themed coaster - it's not finished yet, but I'm pretty pleased with how it's looking. I'm really looking forward to more themes and bits to build with (and water)!