Status bar: Speedy's name color should be changed to something not used by the backgrounds so you can keep it as a constant. I think the name should always be cyan with a black outline.
Overworld: I like the tiles, as they really do have a Sonic vibe. That said, it's overly spacious. Would you be willing to add more decoration like grass, rock, more flowers and such around the paths to flesh it out? Good palette, also.
Speedy: His shape is good, but the palette makes it really hard to distinguish the features of his face. A more saturated, darker cyan, like your avatar, would look better here.
House: The tileset here is really bland. The thing that irks me most are the floor tiles. I'd suggest something more detailed and homey, like a wood or stone floor for character. A less saturated background would be easier on the eyes, too. Try drawing a stove where they're simmering some chili for chili dogs in the kitchen.
I think it's a good idea to have the beds be colors responding to the characters, but the beds aren't that easy to distinguish as beds.
Here's an example and
here's a more stylized example to help you detail the beds.
I feel like an extra line break would make the message boxes easier to read quickly, perhaps condensing to fit. Labeling all speakers would also be helpful. Don't worry about perfect formality in dialogue; what matters most is it sounds like something someone would actually say. I'd also suggest drawing an asterisk in for actions because that's more commonplace than dashes. For example:
MOM: Hi! How are
you doing, Speedy?
*kiss* Love you!
SPEEDY: Mom, you're
embarrassing me!
But thanks!
Special stage: Hmm... I think you should probably take a look at the Sonic special stages and consider drawing a new tileset inspired by what you see. I can't really judge the level design, but I see a lot of repeating things, which isn't good. We'll have to see how it plays out, though. The Chaos Emeralds could use outlines and a little more shininess.
I didn't see a speed patch in the patches section (or I may have overlooked it) so here, if you want Speedy to run faster:
Codeheader
lorom
;defines
!xsp = $0D
org $d535 ; speed table
$EC-!xsp,$14+!xsp,$DC-!xsp,$24+!xsp,$DC-!xsp,$24+!xsp,$D0-!xsp,$30+!xsp
db $EC-!xsp,$14+!xsp,$DC-!xsp,$24+!xsp,$DC-!xsp,$24+!xsp,$D0-!xsp,$30+!xsp
db $EC-!xsp,$14+!xsp,$DC-!xsp,$24+!xsp,$DC-!xsp,$24+!xsp,$D0-!xsp,$30+!xsp
db $E8-!xsp,$12+!xsp,$DC-!xsp,$20+!xsp,$DC-!xsp,$20+!xsp,$D0-!xsp,$2C+!xsp
db $EE-!xsp,$18+!xsp,$E0-!xsp,$24+!xsp,$E0-!xsp,$24+!xsp,$D4-!xsp,$30+!xsp
db $DC-!xsp,$10+!xsp,$DC-!xsp,$1C+!xsp,$DC-!xsp,$1C+!xsp,$D0-!xsp,$28+!xsp
db $F0-!xsp,$24+!xsp,$E4-!xsp,$24+!xsp,$E4-!xsp,$24+!xsp,$D8-!xsp,$30+!xsp
db $DC-!xsp,$10+!xsp,$DC-!xsp,$1C+!xsp,$DC-!xsp,$1C+!xsp,$D0-!xsp,$28+!xsp
db $DC-!xsp,$10+!xsp,$DC-!xsp,$1C+!xsp,$DC-!xsp,$1C+!xsp,$D0-!xsp,$28+!xsp
db $F0-!xsp,$24+!xsp,$E4-!xsp,$24+!xsp,$E4-!xsp,$24+!xsp,$D8-!xsp,$30+!xsp
db $F0-!xsp,$24+!xsp,$E4-!xsp,$24+!xsp,$E4-!xsp,$24+!xsp,$D8-!xsp,$30+!xsp
db $DC-!xsp,$F0-!xsp,$DC-!xsp,$F8-!xsp,$DC-!xsp,$F8-!xsp,$D0-!xsp,$FC-!xsp
db $10+!xsp,$24+!xsp,$08+!xsp,$24+!xsp,$08+!xsp,$24+!xsp,$04+!xsp,$30+!xsp
db $D0-!xsp,$08+!xsp,$D0-!xsp,$08+!xsp,$D0-!xsp,$08+!xsp,$D0-!xsp,$08+!xsp
db $F8-!xsp,$30+!xsp,$F8-!xsp,$30+!xsp,$F8-!xsp,$30+!xsp,$F8-!xsp,$30+!xsp
db $F8-!xsp,$08+!xsp,$F0-!xsp,$10+!xsp,$F4-!xsp,$04+!xsp,$E8-!xsp,$08+!xsp
db $F0-!xsp,$10+!xsp,$E0-!xsp,$20+!xsp,$EC-!xsp,$0C+!xsp,$D8-!xsp,$18+!xsp
db $D8-!xsp,$28+!xsp,$D4-!xsp,$2C+!xsp,$D0-!xsp,$30+!xsp,$D0-!xsp,$D0-!xsp
db $30+!xsp,$30+!xsp,$E0-!xsp,$20+!xsp
Adjust $0D to your liking but be careful not to go too high as there are big caveats. I think it caps at $14 before it starts to cause problems with jumping. You can patch this with Asar or xkas. Save it as speed.asm or something.
I haven't looked at
this patch yet but it does make the player lose coins when hit. This could be really useful in making a Sonic-style hack.
Lastly, try making use of Sonic ExGFX. There are a lot of rips from various Sonic games, and if you can draw what you don't have in a similar style, you're golden.
Good luck with your project! I hope it turns out fun.
Just look above you...
If it's something that can be stopped, then just try to stop it!