Help! I love this game but..

I LOVE this game and used to play it awhile back! I recently re-downloaded it and keep experiencing the same glitch. When I try to add more elements (+) or use any of the 4 bottom buttons the whole game stops working. I have to completely close the app and keep trying until it lets me...
If there is a way to fix this please please do so!
I am a very big fan. Great game!

Gellka about Zed's Alchemy