No, Java is just as powerful as C++. I know your code is simple, especially because I assume that you're using Greenfoot's built-in collision which is notoriously inaccurate...

Translation: The player is an archer, and his objective is to eliminate the monsters of the scenario. The scenario consists of a series of obstacles and walls... (comment: I have to guess now.) There are powerups with arrows and more life. If you touch the monsters, you lose life. Once you finish off all the monsters you advance to the next level! Currently Implemented: Movement of the player and the arrows. Movement of the monsters. Arrow container/counting? First level. Monster death. Pending: Menu, help and messages. Player death. More levels. (The above seem to be implemented already).

Nice! I watched your tutorial before making my Infinijumper scenarios; though I daresay mine is more complex - and therefore much worse, since I accomplished much less lol.