Yeah this game was inspired by the paint blob section in Portal 2 haha. You're right though, the colors didn't really matter since there wasn't much interaction between them. I was actually planning on adding some puzzles that combined the speed and jump together, to be able to reach really far distances but didnt have enough time to think of a good idea to combine the 2 together and implement it.
The wall on the left can't be jumped, I made it high enough so the jump ability won't be able to make you go over the wall. But there's probably a way to do it if you combine the speed and jump together some how.
With the green color, it was supposed to actually be used as a sticky color that froze your position immediately. I had no idea how to use that mechanic at all so I opted for what it's used for now. The "None" color was also supposed to be used for combat, but that was when I was over scoping the project like crazy lol