I started playing at 2.0, and the game has come a long way! Learning how everything works in 4.0 took a bit of time, but I really enjoy the new features. Being able to produce your own enemies is so fun. I also enjoy the mass driver, it's so stupid and cool at the same time. The amount of content you have added is amazing, how much new stuff did you have to code? It feels like almost a complete revamp, but I prefer it over the older versions. Can't wait for more updates!