Is it allowed to put a bitcoin address on my game page for people to donate to me in bitcoin?

We don’t have any issues with a developer adding links to other donation systems on their page, but we always encourage people to use what we have built in, as we can’t offer any guarantees about transactions done through other platforms to our users.

The way I understand how Bitcoin wallet addressing works, if you put a static bitcoin address on your game page, you will need to change it (i.e. update the wallet address) every so often due to the problem of bitcoin's block ledger moving forward.

You should instead use something like Mycelium Gear, and upload your gateway page (which Mycelium Gear gives you the code for) to a third-party web hosting solution, and then link to your gateway page from the game page so people can send you bitcoins using a web address that never needs changing instead of going straight to your bitcoin wallet (and maybe hitting an error when the bitcoin wallet URL needs updating).

It's not very convenient, it's better to find another way. I trad only myself, and here, of course, you can not do without expert help. For example, I found a whole list of https://safetrading.today/ . You may see and read it yourself. I believe that it is helpful, and you will learn more. You can also uncover important information and evaluate which data you should prioritize.