The "no characters or backgrounds" thing isn't really working for me. It's funny when you break out of it and show some actual characters for a panel:
/comics/SirBelfin/447441/
/comics/SirBelfin/447442/
But then in between it's not really that funny.
Aside from that, the quality of the humor is at acceptable levels. Not brilliant, but not bad. Welcome to Stripcreator.