Double tapping key input spams more than a 2nd input?

There are many approaches to a managing a double tap. This is one approach.
Regardless of your approach, I would recommend moving the the logic out of the keydown event and into a procedure that you can then test if the keydown is a single or double or if the double tap action is already in process. You will also need to decide if the double tap action can be interrupted or restarted if a second double click occurs before the initial double tap action/animation is completed or are repeated double click requests ignored until the current double click action/animation is completed.

The following is based on the double click and will ignore other double clicks until the initial animation is completed…then it resets for the next double tap.

What is your FPS?

If it’s 60… 5 frames divide by 60 (FPS) is .08 seconds to play the first animation the you ask it to wait .1 so you are at .18 seconds… add another 5 frame animation and now you are at .26 seconds or more which exceeds the double click timer of .2 seconds.

Try increasing the double tap timer to .3