Love the Mega Menorah 9000! ... but might have overheated mine?

Does anyone have any suggestions about what's a reasonable length of time that the MM9000 should be able to be plugged in and running without overheating the components? I'm wondering if I might have connected something wrong, because the other night I had been running mine for about 15 minutes when it suddenly stopped working. When that happened, the 4-pin Color button felt very hot to the touch, but all other components were still perfectly cool. Do button switches have a a correct orientation that they're supposed to go into the board? I didn't think they did, but it's worth checking! I'm wondering if I killed that button with excess heat. Is that possible?

Now when I plug in the menorah after that event, the LEDs go on and I get power to the board, but the LEDs aren't being controlled by the programmed chip, it seems, because they're just doing their own thing and going on and off and choosing colors at random without responding to the Color and Night buttons. I can see from the schematic that the Color button is connected through R1 to one of the chip pins, so I'm guessing that if I burnt out the Color button, that would probably break the circuitry that controls the LEDs? (Is there a way I can test with a multimeter to find out if the button is dead, or if it's something more serious like the chip being dead?)

Thanks for any advice you can give me, and thanks to Evil Mad Scientist for making this great kit! I loved putting it together!