Thanks for the feedback!
I've slated a post-jam update that will have the siren only wail 3 times instead of throughout the whole speaker messages (and that also adds a mini game that was left out of the jam version due to time constraints).

First thing for Ian is to keep the police out, and so he must stop the door from being opened.
So lock the door? (Ian can examine, i.e., right-click the door lock and find out that locking the door won't stop the police.)
So perhaps stop the door handle from being depressed. That would block the door, too. But how?

The cabinet that is directly next to the door might fit the ticket (right-click on the cabinet to examine it).
Yes, it does fit snugly under the door handle, but (left-click on the cabinet to interact with it, i.e. move it) the cabinet doesn't budge.

Why is moving the cabinet so hard? Let's open the cabinet and find out. (There's a foot switch on the cabinet shutter, interact with it.)
Ah, it's full of crates. (Right-click on one of the crates to examine it).
They are heavy cartridges and so seem to weigh the cabinet down.
(At this point, it's important that Ian has examined the cabinet so that Ian knows that it's is the right size to block the door handle.)
(Left-click on a cartridge, and Ian will move the cartridges out of the way.)

Right, so now the cabinet is empty, so let's move it. (Left-click on the cabinet). Oops, it still doesn't move?
What's wrong? Let's look carefully in and around the cabinet to see whether we spot the problem.
Ah, there are screws in the back panel of the cabinet -- it seems to be screwed to the wall! (Right-click on one of the screws). Yes, it is. 

So we'll need a screwdriver or something in order to get the screws out. That's going to be hard, a screwdriver is nowhere to be seen. Are there any receptacles or nooks that might contain one? Or is it covered? We'd need to look around and right-click (examine) the promising spots (note that the cursor changes whenever hovering over something you can look at or interact with, so there are hints for this search).

Hm. There is a receptacle that Ian is very interested in looking in (when examining it), but it's closed. And Ian knows what is needed to open it ... perhaps the search above has already uprooted something appropriate to open it ... or we might need to continue searching ...

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