Thanks for noticing, I have a number of versions of this type of game and I missed this :); I will fix the title to Boulder Crash on the page graphics. With regards to the delay with any updates to the NES version, its due to issues I was having with banking. The code doesn't fully fit into 32k which is what gbdk's NES ROM Mapper uses. I will sort out the crashing, though as that can be easily fixed. Not sure when or if I will extend the NES version after that.