Loving the free version of Spelunky from the Chrome store (even moreso that its an actual application and not a link to somebody's website).
Is there some functionality missing from this game though? From what I understand you can save your progress and best games and whatnot in the paid version of Spelunky HD, but in the app I have it never remembers how far I got or how well I did.
You can't save your progress in individual runs in SpelunkyHD (or the executable version of the original Spelunky), but it does keep track of your statistics (deaths, high scores, enemies/places/items discovered) and contains unlock able characters not available in the free version of Spelunky.
This question will outline the differences between HD and the original (the HTML5 version is a clone of the original version) further:
