Bullet flying in a high speed.
The game was fun to play. Nice for going to mouse-based navigation instead of the keyboard-based one.
First, the game could have been 30% more boring if there wasn't that great choice of music you used.
And now the rest:
Difficulty, for the most part, seemed just right. Some of the levels were difficult, (I was dodging like a mad to avoid the obstacles) but I still managed to beat some of them in the 1st try (like 8-3 for an example). That, however, doesn't mean that they should neither easier nor harder. It's also a nice touch that the level difficulty was greater in levels that required less computer preformance (desert levels for an example).
However, there were a few gameplay problems:
1.Sometimes it is all for memorizing. That goes for mainly hammer brothers in the castle levels (some of the hammers were difficult to dodge. For an example: to dodge the last hammer brother in 7-4, I had to go to the right side of the screen)
2. The giant chomp boss could have been easier. Maybe the flight speed slowed down by 30-40% or so due to the fact that you can't go to the right side entirely.
3. Mouse sometimes just goes off the screen. How about adding an option where a red dot or something like that indicates where your mouse is? That could be also useful for placing the bullet after dying.
4. Those fireballs in the last boss stage were too hard to catch.
It would be nice of you could make little indicators or something for end-of-the-level flags which, when hit, give you a good amount of points.
Glad you fixed the menu. It was a pain in the back before.
I'd suggest that next time you use level unlocking and save mode instead of level codes. However, then you have to be especially careful so people don't get stuck at certain point(s) of the game.
Overall it was, well...very...well...fun to play. Could be nice if I could hit Mario next time with a Bullet Bill. ;)