Hey Geledin,
1. Implementation isnt finished for the minigame. It was more as a proof of concept. Further iterations of it will be done further in the year.
2. That might not be the game and might be a graphics card issue or monitor.
3. I don't think any graphics card to date uses Direct X 2.5 but in the event you are using a very old graphics card, you migh tnot be able to run this game as it requires Direct X 11 or more. If you don't have the latest Direct X drivers then you might have problems running the game. But obviously, that isn't your issue. If you are having trouble with Direct X installation or updates, you should probably contact Microsoft or go over to their forums and ask for help as I unfortunately do not have the knowledge or qualifications to help you. :)