ALEX KIDD IN MYSTERY WORLD

Another idea is to hit the enemies twice because they are stronger than normal ones!

Just a few ideas more. I don't see the advantage of HD-Mode. I only see blurred graphics. Instead you could make a 3D-Mode in same perspective (side). If it is not too much effort this could make your version of Alex K. very special and unique!

Main problem is that I don't know in which direction the game is going! Are there new randomized levels? This would be cool, but you need a better level structure (like Miracle World). Blocks should be placed like in the original (not overlapping a hill).

I think the player should be able to activate items in a level by pressing a button (as in the original game).

If the character collides with a corner of a block while jumping he is bouncing in a strange way. I think you should make that effect much softer, because it destroys the flow sometimes. Also the (Retro-)scrolling should be softer.

It could be a good game, but in my opinion controlls are not precise enough. For example you can not move the character in little steps. He is going a bit too far under the block. I can't play it in this version.