I am currently working on the issues people have mentioned and plan to upload a new version shortly, my apologies for not replying to individual comments but I don't seem to be able to at present.
Specifically to make the doors leading to the next level more distinct from the Doors leading to the level selection screen.
I also have a couple of bug fixes planned for a few other issues as well.
Thank you everyone for your comments and feedback thus far.
H for hint didn't seem to work for me on the last difference on the last level after the sun came up, had to repeat the game a couple of times because of that, but still a very good game. Eager for the Next in the series!
Wish the reset button worked after you took your last shot, annoying having to wait the three seconds when you know there's no point. Other than that good game.
Interesting game, sometimes the bombs don't cause the same reactions when left unchanged between attempts, and the loading level doesn't seem to take into account when you complete a level, but when you start the next one, minor inconvenience, but if you don't proceed after a level completion but quit, you can't continue from the level you got to but the last level completed.
 "A Shift in Time"){kind=icon}
 "6 Differences"){kind=icon}
 "Pirate Defense"){kind=icon}
 "Crush the Castle"){kind=icon}
 "Cubic Disturbance"){kind=icon}
 "Bible Fight"){kind=icon}
 "Electric Box"){kind=icon}