I did beat the game with enchanter and warrior (and clear optional dungeon too!).
confuse spell is the key for later level.
My warrior was built on stealth, evasion, and reflect with no malee upgrade.
Out of memory issue is usually caused by memory leak. Try look into your codes where you instantiate object and keep pointer for reference. It's not about open several tabs or not enough memory allocated by WebGL
Hi, did you experience it while the game is loading or while running? If it is happening while the game is running, I have gotten some reports that Ctrl+ Click enhancements have been causing this, which I will fix in the next update. However, if you experience it while the game is starting up, it is likely caused by the browser parsing code, which cannot be prevented. Read more here: http://docs.unity3d.com/Manual/webgl-memory.html (Currently the game does very few instantiation and uses object pooling so if memory leak is occuring while the game is actually running, it may be due to other issues, but of course if you have more more details about when and how that happens, it can help). I'll edit my previous comments to be clearer.
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 "Enchanted Heroes"){kind=icon}
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I will be cleaning up the update notes in the next patch - they're getting a little too long anyway, thanks for the note!