If you are having issues with the performance of the HTML5 version, download the desktop versions, I've found them to perform better.

Control with the arrows keys.

When add-ons are picked up, press Z to use their ability or X to drop them again (note: the add-on will be dropped in the direction you're facing, dropping an add-on into a wall is not recommended).

When you are using two attachments, press C to switch between them.

The source code for this game is available at https://github.com/danielg0/botconnect