itch.io

A game that has some of or all of the mechanics: Limited interaction or the ability to be played without interaction, rapid growth - often exponential, prestige mechanic(s), An end goal/mission or a general goal of getting a higher amount of currency, and a system of buying and upgrading buildings, units, or similar.

Pretty sure everything is indie on itch.io but just in case you want something extra indie.

Products that involve or comprise source code, including programming games; does not refer to products with their own source code available, open source or not.