iPad 1 Tipsy? Almost 2 generations behind...
The CPU in iPad 1 was great for its time, and OzRunway I am sure does't get much testing by the developers on a dinosaur.
OzRunways=heavy GPU usage, heavy math usage, high cpu load overall and network, GPS, BT to boot. Don't forget all these devices, be it Apple, Samsung, etc have a useable life (technology-wise) of around 2 years max.
my 2 c