Just found these 2 games very fun! The first version is kindda hard if your first time play i recomand you play the second version first.
(Tips: Delete is MP potion and insert is HP potion. But about 100 for every item like Potions HP/MP and rocks in version 2 for using Shadow parnter. Click the only npc for spawning and buying items.)
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First version
Title: Maple Story Papulatus 

Instructions for keys are all at the below of the game screen webpage.

Link: http://www.y8.com/games/Maple_Story_Papulatus

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Second version (Its easier and fun, first time player recomanded to play this first ^^. This also has more skills keys: ASDFGH to activate all skills ZC for attack, X for healing by mana. So don't need buy HP pot so much ^^)

Title: Maple Story Pianus

Link: http://www.y8.com/games/Maple_Story_Pianus

Enjoy