Prototype Azymuth

At this stage, it's not a game - just a prototype with which you can play with physics. Green tiles allow you to change gravity. Also you can use portals, enable some mechanics and drag/move objects (cubes). On this map, you have to collect 3 stars.  If you want to help me developing this project, leave me a short comment about physics - or bugs which you found. Be free to share your feelings. Thank you for your help ++