Wonky game embedding on the LD page?

While we are finally done (yay!), I'm wondering: the LD Embedding guide calls for a strict 948x533 solution - but following this, we still get scroll bars and a not quite fitting embed. :(

Does anyone have a suggestion for us?

Anyway, if you want to brush up on your occult sigil painting skills, feel free to check our game out: https://ldjam.com/events/ludum-dare/55/paintamonium