Wario Land SNES is very disappointing. Throw blocks instead of dashing through them? SMW power-ups instead of Warioland powerups? Can't hold enemies above your head? (there's a patch for that). Also all levels can be accessed at the start. Was that intentional?
Its nice to see a color version of one of my favorite GB games but the limitations of SMW held this back.
I thought accessible levels was a good aspect actually (though it looks weird when there's no indication of having beaten a level or not), along with the limitless tackle and the changes to the first boss. But on the whole I agree. Posted my criticisms on the dev's channel as I really would like to see a hack like that done well.
Jump physics - The physics get weird when you hold down the button, as Wario starts semi-hovering in mid-air and therefore falls slower. These physics clearly need work.
Jump height - the shortest distance (from just touching the button) should be shorter, like half of what it is now.
Tackling - It should work more like the original. I like the idea of a limitless tackle but it should be a viking helmet ability instead of the apple, while big wario can tackle for a short distance. You should also be able to tackle while jumping, it shouldn't be canceled. It also feels weird to have be able to pick up blocks, and having this on the same button as tackling. You should be able to pick up enemies, but not blocks, and it shouldn't interfere with tackling. IIRC it was automated in the original for this very reason.
Movement - Speed is too slow by default and too fast and slippery when running/tackling.
Damage through touching - I thought it was weird how I could tackle into a spear and especially a stomping block trap but not walk into the first enemy types as big Wario. You should be able to walk into small enemies at least.
Breakable blocks - They should be breakable through tackling, and from below. This is like the main mechanic of the original so it needs to be in there I think.
Top of ladder tiles - You should be able to walk on them. Combined with the lowest jump height, it made maneuvering on ladders annoying. Players will want to be able to drop quickly, and jump off ladders and pound blocks near them from below smoothly.
Dragon helmet - It should destroy/activate blocks - To not make it OP and to emulate the original one, you could make the fireballs disappear after the second bounce or something like that.
Flight helmet - Maybe I'm missing something, but it seems to only let you hover and attack right now? This is a severe downgrade from the original.
Crouching - you should be able to move while crouching. If you can't implement that, levels should be changed so you don't need to get into tight spaces to crush blocks like in level 1.
Animations - I don't get why you chose the "crushed" frame for crouching? The dragon helmet fire animation also needs work. Also, Wario's animation on the world map screen when big makes part of his sprite cutoff at the top, which doesn't look good.
Item switching - It doesn't work, so you can't go back to tackling from using the cape for example. Pretty annoying.
Pretty harsh, sure, but the original is one of my favourites and this felt not as good as either SMW or WL1.