[racket] WORLD manipulation doubt

Hi,

I am creating a game which runs in the below world.

(define-struct world (myself monster1 monster2 food1 food2))

The objective of the game is to move yourself in the world, not get hit by
monsters and eat the food.

I am done with
1) Keyboard manipulation of *myself*,
2) Stopping the game when I hit any of the monsters (monsters move randomly
in the world).

*Question1:* Placing the food is also an easy task. But, how do I modify
the world when I eat the food?

I am thinking of writing a procedure that checks if the user hit a SPACE
button and is also near the food. If both of these are true, then that
particular food image at the location should disappear and the game should
continue.

*Question2:* Also, are there any timer events in racket where I can include
a stop clock counting down from a number to zero?

I am a bit confused as to how I should tackle the idea.


Best,
Zeek
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