After finally trying this, I can only say that the hard part for me was creating a wallet in MetaMask. They are using MetaMask as your wallet so you can fund your game and/or investment.
You have to download a browser extension of MetaMask first so whenever you want to play/invest, MetaMask will pop up to connect your wallet to Lottoshi website and get a fund (ETH).
Everything else is fast and easy.
Unfortunately Metamask is not under our control, but if we find easier wallets to use well definitely share with the community here, thanks again for the feedback.