ID:2010088
 
Resolved
The webclient did not support microlayers, an ancient feature that helps in some cases to tell which of two items on the same layer should be drawn first.
BYOND Version:509
Operating System:Windows 7 Pro 64-bit
Web Browser:Chrome 47.0.2526.106
Applies to:Webclient
Status: Resolved (509.1319)

This issue has been resolved.
Lost my post (again) after being logged out of the site without knowing about it because I logged into a game to test it out. So frustrating.

*sigh* - Anyway...

509.1318

Seeing some issues in the webclient where assets aren't appearing and after that issue is addressed, you should see that there is a layering difference between the webclient and dream seeker.

See the example project I'm sending you in chat. Run it in DreamSeeker to see expected and then run it in the WebClient.
I got your example and tried to run it, but all I see is the game board with a "Flip pile" box. I'm getting a runtime error that indicates a file called "Template" is wanted (gameroom.dm:33), but that file wasn't included in the source I got.
With your updated source I was able to find the layer issue, which stems from the fact that Dream Seeker has an old outdated concept of "micro-layering" that the webclient left out for simplicity. That turned out to be relevant here. (The best way to avoid an issue like this is to always use explicitly separate layers when possible.)

I'm not seeing a missing asset issue, but if you can come up with something for that in another issue I'll take a look. This one I'll mark closed once I decide on the version number.
Lummox JR resolved issue with message:
The webclient did not support microlayers, an ancient feature that helps in some cases to tell which of two items on the same layer should be drawn first.