High cpu and mem usage

[Darkfader]

When i start my computer, and launch my chrome everything works fine. Launching pocket legends, and everything works fine for hour or two. After that i have noticed some major lag issues. Then checked process cpu/mem usage and found out surprising results. Cpu usage went from 50% - 85% wildly bouncing, mem usage was 900 000kb. Process was nad64.exe, so i assume pocket legends use that.

Can't at the moment give any deeper analysis about it, but i think some temp storaging makes it need more recourses after couple hours playing.

Its not that im low spec computer.
Amd athlon 6000+ 3,2ghz dual core
some random kingston mems, 4gb 1333mhz