There are a couple of misspellings left, but nothing too serious.
The riddles are nice, however, in the end too similar, you should get away from that alphabet-to-number thing (the one with the offset was interesting, but maybe try something less linear in the next episode?)
5/5 from me, was fun. Needs a good story to back it up, so far you have not given much away, so there is hope!
You should implement a way to clear the memory. After a while (depending on the computer ofc, but I do have that problem) the game starts to stutter/feel a bit sticky. Refreshing the page helps, but I would suggest to clear the game memory with every regional transition or even after every (couple of) fight(s). Otherwise fun game.
Rocket launcher and tesla gun r bad. Sad that 'best' weapons r fail designed cuz u stop hitting stuff in ur front when bosses fly around in ur back. Penetrating laser > rest
 "Knightfall 2"){kind=icon}
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 "The Programmer RPG"){kind=icon}