This game is a very valuable concept with the limitations and theme of the game; the dev had a very clear vision regarding the story through gameplay. The game on itself is clean and with a strong gimmick; but lacks majorly any music, sound or animations which is a important polish to make the game stand out.
The curve is also quite slow making the growth process logarithmic rather than lineal. (Perhaps overshooting to prevent the game from being too easy.
Otherwise its concept is a very promising game and its truly a strong contender in the jam.