the teleporters are a peice of useless junk
No, teleporters are awesome. I just stole one from a shop (it's easy as hell, just grab it and teleport) and played around with it. You can teleport up, left, and right, but not down. Teleporting into a wall isn't as common as it sounds, either, and you can telefrag things incredibly easily. I didn't try killing the shopkeeper I robbed with it, but it would probably have worked.
Speaking of killing shopkeepers, I just robbed a kissing booth with an ordinary bomb. I recommend entering with an armed bomb and throwing it at the shopkeeper. He'll fire, killing the girl, while you run for it. He'll walk back and forth a little, and there's a good chance the bomb will explode and kill him, assuming you entered with it armed (so it doesn't have to tick out it's entire fuse). It should be possible to be more certain if you wait even longer with the armed bomb before entering, so it explodes almost on contact.
I guess killing the merchandise sort of defeats the purpose of robbery, but you get a free shotgun, which is way better than a health point.
Also, who here besides me has gotten the Udjat Eye? I found it in one of those big chests (the ones that you need a key to open). When you grab it, it says something like "You got the Udjat Eye! You feel awakened." And it lets you see the gems inside the walls.
And those glowing beetles are money, don't throw things at them.
One more thing, in case this hasn't been mentioned or somebody doesn't know: the idols in the second world are on top of blocks over piranha-infested water. When you grab them, the platform disintegrates from the edges inward.