Implemetation based on OOSD Project 2 requirements, developed based on provided Project 1 solution, with following assumptions:
- mario can defect monkeys with hammer holding
- only game score (not include time bonus) goes to level2 if level1 win
- banana shot disappered when the corresponding intelli monkey die
- terminal velocity for all class implements PhysicisAffected, with 5.0 temrinal velocity, except Mario with 10.0
- display donkey health info for both levels
UML design prior to code implementation: UML_platformer2.pdf