Sometimes 2 tubes are one over the other, or 1 tube and a rat. You could check if there is a collision of objects when you put the tubes and the rats. It's a bit frustrating to time the drop.. :)
Having to time the colours doesn't make it more enjoyable, just frustrating.
And since that's the entire basis behind this game, I'd go try something else.
Just keeps locking up on me when I start the game. (IE11)
Gets slow fast
Sometimes 2 tubes are one over the other, or 1 tube and a rat. You could check if there is a collision of objects when you put the tubes and the rats. It's a bit frustrating to time the drop.. :)