We've been testing the game on a variety of hardware platforms and the results are encouraging. Please keep the requests and questions coming! We're taking everything into account when deciding the final set of features and requirements.
A quick note about Steam Workshop support in this game. We are supporting cloud saves only. This means that your own local scores are saved to a file which can be uploaded to the Steam cloud so you can move them around to the different machines you play on. This way you can keep record of your own personal top scores, separate from the Steam leader boards which are also supported, of course.
Stay tuned!