4 Areas. 10 levels each. Each level has between 1 and 4 rooms that comprise it. Survive the perils that lay within, and do it as fast as possible, optionally collecting coins. The core gameplay works well enough, even though I absolutely hate the horizontal inertia. Some easy levels, medium, hard, "rage-inducing" as the Store page says and some that are near impossible if not actually impossible. Some of the rooms should be levels themselves, not just a small part of a whole level with other super difficult parts.
But there are a lot of broken things. At least 1 Bitcoin Achievement is broken, with other Gold Time Achievements being impossible to achieve. Why? Because some gold times are 10 seconds. 10 seconds to deal with 3 or 4 rooms. It takes at least 8+ second to deal with just 1 of the rooms, let alone the entire level. At some point the default ball completely broke, failing to die correctly and then just clipping through the boundaries of the level. Your Bitcoins aren't saved when you quit and return to the game later, making it difficult to know how many you actually have. There are several ways to break the menus.
Death by a 1000 cuts. Mostly solid gameplay ruined by broken Achievements, impossible times and various menu bugs. And while I'm here, ~3.5 years after launch and the Custom Levels and Speedrun sections are still "Coming soon". Yeah, sure.
