Good music. Nice visual style that doesn't really sync thematically with the material.
I got to the point where a single upgrade remained, but it requires another upgrade that doesn't appear to be implemented yet (leather gloves) as a pre-requisite. The advertised scaling of card power/colors wasn't present, it cut out after two color upgrades with no apparent way to progress beyond green. There was also only one type of Gambler available, not multiple ones with distinct behavior.
So, fun, but incomplete, in the "play til you decide you're bored" style that doesn't offer any closure.