I started with just the orange/directional bubbles, those were working pretty well and I felt like I was almost done (around the 2:00-2:15 hour mark). However it was pretty challenging, my playtester (wife) had a tough time getting the hang of it. I realized I could add a new bubble type without much code at all, hence the green bubbles which just don't move you in a direction, and they decelerate you slower so you get that bit of drift after hitting one. That created a much smoother experience to start the game.