The Dollar Game

The Dollar Game is a little {maths} game in which you try to share money between people, so that they all are no longer in debt.
If you want to know what's exactly about, watch https://www.youtube.com/watch?v=U33dsEcKgeQ, a video from Numberphile, where they explained and introduced The Dollar Game to the world :).
Modes:
- custom, defining your own number of vertices, edges, and money in the system
- leveling, so becoming harder, and harder over time (can be reset by giving up)
- random, just some random values for the number of edges, vertices, and the money
This maths game might look simple, but trust me: it can be really demanding to get that last one or two out of debt! :D
If you create a custom game, it might be very hard. It is always possible since version 1.3.0.
My seven year old little brother accomplished to reach Lvl 21, then I needed my phone back XD.
Edit3: I have a new game, Elemental Community (https://play.google.com/store/apps/details?id=me.antonio.noack.elementalcommunity), come and take a look! :D
Edit: Now I know, why a lot of apps ask for your feedback :) : there really are bots, who give bad ratings, so to minimize their effect, the best way is to have more real voters :). If you've problems, just let me know, I'll try to fix it.
Edit2: If you have wishes, just write me :).
Edit4: I now published the source code, for everyone interested: https://github.com/AntonioNoack/TheDollarGame