Enjoying it so far...one initial complaint--the little balls telling me the opponent's immunities and strengths are really hard to discern between, especially blue/purple/teal.
15: put 2 portals on the ground just to the right of the glass barrier. jump in one from the top ledge, you should now be alternating between the blue hole and the yellow hole maintaining a constant height. At the apex, pop a portal on the ledge just below and to the left of the blue floor. Let yourself get to equilibrium here, and simply wait for the blue floor to change, land on it and jump across the little gap.
This is not a bad game. It starts well, but I think the badge kills it. Once you get the minigun, it seems as though it is conceivable to play indefinitely. Unfortunately, the badge requires about 10 levels beyond the minigun, so any fun you were having early in the game is destroyed by the monotony of getting the badge.
I give it 2/5. It looks pretty, but the fun of playing it drops quickly--unfortunately, about as steeply as the learning curve. The instructions need a significant upgrade as well. Getting the hard badge isn't as difficult as one thinks---if you make it through the first 4 levels without getting hit, your multiplier will be so high that you will have no problem finishing the challenge.
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