G5 is probably best known for their adventure and hidden object games, but they have been branching out into other genres including time management and more recently physics puzzle games. Jumpster was an interesting first effort in the latter genre whose initial release was ultimately marred by an almost absolute necessity to buy IAP in order to play for any length of time. Green Jelly is their second physics puzzle release and it has managed to make a much better impression on me overall, except for the less than amicable controls. At least there's no IAP though.