Katchem

Just extract and run :)

In case you can not run the game under Windows:

(1) Download froggame.rar

(2) Rightclick 'extract here'

(3) go into the folder 'froggame'

(4) Drag and drop 'froggame.pde' onto 'processing.exe'

(5) Go to Tools>Add Tool...>Libraries - filter for "sound" and download/install:
"Sound | Provides a simple way to work with audio" by "Processing Foundation"

(5) Hit the Play Button in the upper left corner

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(6) You can try compiling it yourself when Processing is opened through the menu option:
File > Export Application

In case you can't run the game under Linux:

(1) Download froggame_linux_with_source.rar

(2) Extract and open

(3) Extract processing-3.5.4-linux64.tgz

(4) proceed analogously to the windows instructions (open froggame.pde using the installation of processing)