The concept itself is very simple but the game expands uppon it in exciting and fun ways! The animations are fresh and smooth, The dialogue and cutscenes are well-written. A little bit more environmental detail could be added but other than that the game is very well-polished! I am excited to see new levels come out.
Some ideas for the game would be randomization of the numbers allowing for better replayability and challenge along with adding higher difficulties to later levels incorporating 2-3 digit numbers and perhaps a division/multiplication system.
It works as a great little brain teaser and also a reminder of how simple math can still be tricky under the right circumstances!
Fun game that develops a whole new kind of puzzle! Story keeps evolving so I'm sure it will be even better in the future