Oh yeah, space and analogue menu controls! I'm sold already. The clicky buttons of the UI felt so satisfying to use. Art style & sound design were very fitting, it even had some voice acting. While the isometric view makes it a bit harder to judge everything, I thought it added to the suspense if I did everything right.
An alternate control scheme would really add to the atmosphere (maybe numpad + multiplier key for x2/x3 and enter to confirm), that's pretty much the only thing I could suggest. Awesome entry!