The style and vibe are great! This is the kind of game I'd play to kill time while waiting for something and then end up spending way more time playing than I had initially planned, the kind of game where I'd say, "Okay, just one more level," before playing multiple more levels (or in this case, days). Very satisfying!

Wow the moment the card are going to move around !!  really nice game!  tally is not my stong.

great little math game!  an excellent brain workout.  i completely forgot about the order of operations at first!

i REALLY like how it's a resource management game too - strategically choosing cards (especially operators) to maintain a varied supply.  and the tension really goes up when you're dealing with a timer AND shifting cards; almost too tense for a mellow-leaning guy like me, but I think it adds a fun sense of urgency.  i occasionally came up against an aspect of the game that surprised me:  wanting to use as many cards as possible and having multiples of a certain number - like eights, for example - I might've wanted to do something like 89-81 to get to the target number of 8, but as soon as I clicked on the first eight, the game scored it as a one-card play.  i suppose, once the player realizes that, it can be seen as an additional challenge - trying not to finish your equation too early.  and I realize that the only way to prevent it from happening is to force the player to hit enter or something (to confirm that their answer is their 'final answer'), but I thought I'd mention it anyway.  more of an observation than a suggestion.

whoa, i MUST have liked this game - the mechanics of it really got me thinking (hence the long-winded comment)