the glassware is in the red room, where they're breeding the monsters in tubes & where the door with the electronic lock is.
That's ridiculous.
As if anyone needs to provide evidence that the game has not ended, when there is absolutely nothing to suggest that it has.
That's an excercise in redundancy.
The story is obviously not over so, equally obviously, the game has not ended.
Seriously, why would you think that it has?
There is absolutely nothing to suggest it's over. Credits to thank his patrons at the end of an episode is nothing out of the ordinary.
I do not see any valid reason for your doubts to exist.
If the game was over do you not think that, just maybe, the last dev update would have mentioned that it was coming to an end? Or that it would mention anything about the next release being the final episode?
It did not.
As such, there is no reason to weirdly assume that this was the final episode, simply due to some credits thanking his patrons.