Hi mhemho, your project looks like the kind of alpha that needs carefully selected testers rather than just a large number of random players—especially since you’re looking for people experienced with fast movement games, controllers and particular display formats.
I recently built Iconic Nexus, a new testing-exchange platform for indie developers. Developers can create project campaigns, specify tester requirements and request structured feedback, while members earn credits by helping test other projects.
It’s completely new and I’m currently looking for founding developers who can help improve the workflow. I may not personally match the high-skill movement profile you need, but I’d be happy to help you set up the project and see whether Nexus could help you organise suitable testers as the community grows.