Warning: Be careful before playing this game as you can get a serious heart attack.
But anyway, I had a lot of fun playing it :P what a simple, but wise idea.
Theme:
Oh that's probably my favourite theme idea on this jam by now. Literal, simple, but very well developed and fun.
Visuals:
You can't call it a AAA game, but visuals are very well paired with the climate of the game.
Actually for the first time, I have no idea what to advice, as I have no idea at all what could fit the style :P Just one simple thing that got me confused was the 'power' sign. I was almost sure that in writing form it's '^', so I didn't really know for several rounds what I was supposed to do, but when I indentified this little dot, I could play further.
Innovation:
Definitely it's innovative. Unfortunately, I'm not sure if it would be the type of game that you could work on to publish on steam, but I might be mistaken and if you make me wrong, I will buy it (unless you put a ridiculous price for that xD)
SFX:
Sounds are really good. As for music I really enjoyed it, but it would be good if you worked on blending a bit, so that it loops well. You really got me with speeding up pace on Play, that was amazing!
Gameplay:
It's a lot of fun, even if those equations are very simple, they are really intense xD (I've studied IT, so I had a lot of maths out there and still struggled a bit with this time pressure). I've got stuck on one with X + Y . I'm pretty sure I've solved it well (tried several different possibilities), but I couldnt get to the next one, so I might have missed something. But it was fun nevertheless :P
Great entry, my first impression was rather mediocrate, but you positively surprised me and it's one of the nicest entries I've played. Great Job!
PS: And sorry for so little constructive feedback, I really don't know what to advice for the first time :P