It was a simple idea, but it worked very well - good job! Having to stave off birds, then turn off some buttons, chase away some more birds - there was never a time I wasn't doing anything. I especially liked how the difficulty ramped up later in the game, as the temperature increased and decreased faster, which really helped make it more challenging to keep going. It did feel unfair at times though, since the birds spawned so closely to the buttons. Maybe moving the buttons closer a bit, or increasing the camera's size might've helped. The game also did feel a bit long at the start, since it was pretty easy to chase off the birds at first. Some other incentive to change the temperature, like more score the higher it went, would've helped.
The graphics were nice and clear, which made the game very readable, and I liked the effects at high or low temperatures as well, since they made it clear when I was getting close to losing. At times, though, it was hard to read the temperature in the middle - a slider or something might show it a bit more clearly. The music and sound worked fine, but I would say the rumbling noise was too loud, so maybe tone that down a little.
I had fun with this game, and there's a lot of ways to take the idea in future, so nice work on this game!