Good start. I think by fiddling with the parameters of the run/jump/climb, this could be made to feel good. Maybe movement could start slow and (fairly quickly) speed up, just to give a very short acceleration effect when you star and stop. Climbing up could be faster. And, yes, jumping a bit slower. You could also have a short delay after jumping until you can jump again, so that you don't get the jojo bounce. Very promising.

Nice to see that Greenfoot users are up-to-date with the political news of the day, and able to relate their games to aspects of their daily life...

Great game. Played all the way through! You could work on the balance a bit - it's quite easy for quite a while. Making it a little harder would be okay. Also, there is quite a different between the single barrel and double barrel guns - the double barrels are just too weak in comparison. Good fun, though, and very well done!