The video inspired me with some new ideas for goo types =P
Purple - Extremely Bouncy, a bit "stretchier" and elastic than the rest and if it drops it BOUNCES. Level designs would incorporate very few purples along with other colors. Challenges would promote, but not require, use of "bouncieness" to complete.
Yellow - Sticky, can support a set amount of weight when allowed to adhere to a surface. Levels could be designed entirely around Yellows where weight management could become an issue, would be an advanced color since failure cascades catastrophically.
Blue - Rare goo, acts as an absolute anchor. Would be used in harder puzzles as a helping hand and would count as a big bonus for those able to complete the level and get the blue goo to the exit.
Orange - Gravity for orange goos is always pulling them in the direction of the closest wall. Would be ideal for anchoring to high walls away from the ground and would be available only in small groups and again provide a decent bonus for getting them to the exit.
If they have even half of those ideas in the game I will LOVE it! Otherwise it looks like it might get a bit repetitive imo...but still a very very awesome idea!








