At least once a jam, I find a game that doesn't have a whole lot to offer in terms of content or scope, but for what ever reason is just addictive and replayable as hell. This is definitely one of those games.
The concept is fun, regardless of it's simplicity, and I'm so glad you took the extra time to add a theme to it. Maybe if I wasn't as into SciFi as I am, I wouldn't have thought that much of it, but I am, so...
I love the challenge too. It's one of those games where you don't need difficulty settings, because you lose points based on time spent, and you can never end the game early by losing too many as far as I can tell. That makes it really easy to pick up and play for anyone!
The game it's self is one thing, but the level of detail put into the settings insured that there was a true degree of customization for the player. This is not just awesome to see from a player comfort PoV, but also from an accessibility PoVm, especially as it applies to the separate music/sound/speech volume sliders, and the font type. Just as commendable, because of how difficult it can be to get running properly, was the realtime screen reader readout option. The decision to add a TTS fallback was a smart one though, to cover as many users as possible.
The instructions were comprehensive and well written, but I do wish that it had been specifically pointed out that one needs to hold down the key to properly hear the radar, rather than just pressing it. That confused me at first.
I am truly impressed with this game, and while I'm not sure it will make it into the top 10 do to it's lack of flashy gameplay, I think it deserves it based on the features alone. Really, despite how humble it is, this is one of the games that most exemplifies the spirit of the jam by really going the extra mile in important ways.