Hey there, @Oliver_Wassef 
We are so happy to hear that our new app meets your expectations!
As for the questions 1, 2, 4, these features are not supported right now, but we’ve added them to the Wishlist:
Regarding your 3rd question, I am afraid it’s quite a tall order to make the prizes valid within a certain timeframe. However, we have a similar idea for a timer creating a sense of urgency. You can vote on it here - Add timer to show that the coupon is time-limited
About the wheel being cut off on some mobile devices, that’s actually by design. If you’d like to see the full display, just send me the link to the page where your widget is installed, and we’d be happy to make adjustments for you! 