Yes, you will always be able to edit your game after it has been released in the Developer Admin. However, do take into account that all edits will need to pass the review process again. This means it can take up to two weeks for the revised version to go live.
Please note that when you submit a new version of your game, the previous version will remain live until the update is approved.
If your game requires a quick fix because it is not working properly, please upload the revised version and send us a message so that we can take this into consideration when testing. Please make sure to always include the game ID and title in the message.