I would like to make a suggestion : Consider holding the upgrades until I've dropped a ball. Getting an upgrade should be fun, but right now it feels like an annoying interruption. Like an advertising pop-up that I just want to clear as quick as possible so I can keep playing the game.
And I assume this is just for the demo, but please make sure the final version has a "skip tutorial" setting that actually turns off ALL tutorial popups. Thank you.
Many pinball aficionados would also appreciate a vertical-screen mode, if that's not hard to manage.