The cord is always one metre too short.
Clean every bit of it before the clock beats you.
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Pick a room in the Old House and vacuum every bit of dust before the clock beats you. The cord catches on every leg and corner you drive round — and it only reaches so far.
Push the stick to drive. Whatever goes under the front of the vacuum is sucked up. A little push creeps; all the way goes fast.
The cord follows you. Drive round a table leg and it wraps round it; drive back the other way and it comes off. It turns amber, then red as it runs out — keep pulling and the plug pops out of the wall.
UNPLUG winds the cord back in. Then drive to any socket and it plugs itself in. Its battery is flat, so unplugged it can still roll about, but it can't suck anything up. Unplugging and plugging back in is also how you untangle it.
Coins take a second off your time. Lego and socks make the vacuum choke — steer round them. Don't drag the cord across the lamp's foot: over it goes, and that costs you three seconds.
Every room has its own time to beat. Clean it in time and your time goes on that room's board — the smaller, the better. ◀ ROOMS at the top takes you back to pick another.
On a laptop: the arrow keys or W A S D drive, and Space unplugs. The number keys pick a room, and Esc goes back to the rooms.