I have read several threads that report this problem and not one of them has been resolved. I have tried all of the steps suggested like turning off shadows etc but the problem persists. I have only followed one of your tutorials to develop a demo game so I could try BB3 (Geometry Dash Clone) and it plays perfectly on my laptop. When I export it and create the .apk file for my Samsung phone the gameplay is so slow it is virtually unplayable. If the Buldbox team want people to upgrade to a paid version of their software then these problems need to be rectified. I was hoping to start using BB as it is so simple to build a game but if the exported game is unplayable then there is no point considering upgrading. Does anybody have any suggestions what might be causing this or is it just a bug in the software?