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Hi guys, I am making a game that is something a little bit like 'Simon Says'. Basically, the game is about pressing multiple keyboard buttons that are displayed on the screen simultaneously before the timer runs out. There will be two random images displayed on the screen, each telling the player to press 1 to 4 buttons at the same time. They look like this:

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(so the yellow buttons are the ones that need to be pressed at the same time)

Every time the player successfully presses the buttons, they gain 1 point and some additional time. New images are then displayed randomly and you get the idea... If the player presses the wrong button/s, its game over.

What I want to know is:

How to randomly spawn those images and assign keyboard buttons to each random image?

How to add additional time onto the timer when the player successfully presses the correct buttons?

Thank you.

I'm new to Construct, so I pretty much don't know anything so far. I have designed all the sprites, I just need to get it all working.

Basically, the idea of the game is that you have to press one of the arrow keys, and one of the WASD keys at once. The keys are going to be displayed on the screen, and will indicate which ones need to be pressed by turning green. There is going to be a timer, which will quickly count down, and each time the player presses the two keys successfully, there are going to be extra time added, and they gain 1 point on the score. The score will be displayed in the middle, just like Flappy Bird. If the player presses any wrong key, or if they run out of time, they lose. There is also a character who will stand still and change animation every time the two keys are pressed.

Hopefully, I haven't made this too complicated for you guys. I just want some advice on how to make those things work.

Thank you