Playing Games to Get Ideas

1.Does the game have a way to keep the score? Does it have a timer? Are there some intresting sound effects or other effects? Are there platforms that and scrolling background?
Yes there is a way to keep score in all the games I played,In rotate and roll there is no timer also in Ballon tower Defence 3 there is no timer,in primate pile up there is a timing at the end, in boombot there is no timer in Gluey there is no timer,in parking mania there is a timer.
2.How did the game developers do it?
In primate pile up you need to drag and drop.
In rotate and roll you use the arrows in the keyboard.
In ballon tower defence 3 you use the mouse and to click on the items to pop the ballons.
In boombot you need to