Hey, what game version and operating system? Is the computer you are playing on really weak? Would need more info, but memory leaks should be fixed long time ago.
Viewing post in Game Freezes down to 0.5fps
Then your phone might not be compatible with the current game version, that's why I'm working on an engine update to make it work with newest devices in December. But the game worked for you earlier, right? On what version? Or did you buy it without testing? Then I can refund you money. But I did some tweaks to v37 that will be released this week, maybe it will help.