600 agents start with 100 each. Random pairs pool their money and split it at a random point; the seed may let each agent save a share λ. Nobody can go into debt.
Tap to reset everyone to equal. The same ?seed= always gives the same run.
LITDrăgulescu & Yakovenko (2000); saving propensity: Chakraborti & Chakrabarti (2000). Total money must stay fixed and nobody may go into debt, or the page throws.
WALLA physics toy, not an economy.