Love the app, HATE the battery drain!

The app itself is awesome. The game play is easily customized and Im even teaching my son how to play. However, when Im playing it, it goes from 100% battery to 0 within 30-45 minutes and my phone gets hot too. Please fix so I can continue to enjoy this game???

Quinnmo4 about ⋆Sudoku, v2.3.11