This was pretty fun up to level 4. The flashing screen effect wasn't fun for me and added little difficulty. Then, in level 5 I kept running out of bombs and would have to circle around 5 screens to get some more and then make my way back. I got through most of the dungeon and hit a point where I needed a key, but man... I can't keep wandering around in circles. All that said, this is a solid quest and the scripting and puzzles where good overall. Now that I have the whistle, it'll be easier to get around and find stuff, but I think you should add a shop or two that sells extra keys, even for 200 rupees to limit how many people get.