Pros:  None

Cons:  None

Other Thoughts:  99.5/100

Hi.
I don't know how much time you have spent on this tool. But it should very much. Thanks for the great tool.

To be picky, I think you may imrpove your program if it is technically possible:
- add descriptive texts around the numbers
- add a text which tells people to press "T" to try the result out, or create a button for that at best

- add number input box: instead of clicking on the arrow buttons, it would be great if you allow direct number input (ie type 44 in the box)

- function: determine the width and length of the explosion

- function: determine the direction of the explosion

- function: determine the width and length of the explosion

- function: determine the length of life FOR EACH PART OF EXPANSION: (smoke at start, middle, end; life of particle)

Thanks for reading my review.