This should not happen. Please make sure you have downloaded the latest version from the itch page, and then unzip the archive. Then, find the install folder and open the start game html file. If you are playing on mobile (which is not currently officially supported), use joiplay and reduce the zoom to 50%.
Also, make sure you are using Chrome, as this has no issues that we know of. Opera seems to have a ton of problems.
Come to the discord if you are still having problems, post in the #support channel.