2,6 or 10 players guess same numbers, winner will get all others money. the random numbers cames not only block.timestamp but also the seed player provided. every players provide a seed number with guess number together, the numbers will save on smartcontract. when there are enough players, every one can reveal the number. players, platform, minner can not change random number.
this app can run on web with metamask, or metamask on android, trust wallet platform. just open https://playnumbers.xyz and play.
and also ,the website provide source code, you can download from website and run locally. run locally not means offline,the data still sync with smartcontract. so not depend on website. you can play at your owner local sever as well.