I pressed the install button, and saw it in files. I moved it to my external storage and i cant find any exe thing. i am not very computer smart so that may have something to do with it.

you have to download 7 zip, then in the mrkrabs rar file, press 7-Zip then extract. once its done extracting double click the mrkrabs rar folders untill you see OH MR KRABS to open, right click and play the game