A simple dual-button tetris-like. Can be enjoyable for 10 minutes run.
Clarity of the game mechanics comes true once you attempt to play. "Where is my score? Oh, I have to collect chickens with another button...".
And always result in 0 score due of trying to have more eggs while time runs out.
Sounds and visual... Well, what can I say about the game with 6 colors palette, no BGM, and a pair of MIDI sounds?
"Timer decreases more quickly" - definitely not a good thing, it ruins the sense of the game. You are challenged to survive longer - and the game will force you to lose if you do.
Total: Many things to improve. At least try to separate Score and Currency, and/or let chickens be collected with left click into the same array wherefrom they can be spent by either time/score or additional eggs.