Well you can! And I did.

You play as the Dedicated User Defined Entity (D.U.D.E.) Bot in a platforming kind of game. BUT unfortunately he can only walk left and right! Use Cards to enhance it's abilities with features such as 'Jump' or 'Dash' in order to clear the levels.

Try it out: https://ldjam.com/events/ludum-dare/41/dedicated-user-defined-entity-d-u-d-e

Epilogue

Actually one of the Themes I downvoted. But afterwards I enjoyed it. That's the Ludum Dare effect.

Can't wait to play all the other games with other crazy ideas! Gonna be awesome.