im loving the art and its pretty dang intresting, as for ideas bondage, kobolds and size diffrences are always fun. F/F action is also underloved in games so a couple of fem enemys could be really fun, especially like feral fem enemys given their rarity, Maybe a dragon boss for a classic or a dungeon level with orcs and goblin 

Pretty good game! It's just a demo, but still a very interesting idea. I'd love to see what it has in store if I'm being completely honest. This has potential in it, and the art isn't bad either. The main idea that I have though is since you can fight in this platformer, maybe add a weapon system or something of the sort. It'd be fun, and I haven't really seen a lot of platformers who do use a system where you can pick up weapons and fight, maybe one or two, so a lewd platformer with this would be amazing.

Remove stun locks. They make enemies too easy to deal with. And sense you are adding bosses to the game, maybe you could make some "bad ends" when you lose to them (...and maybe one where mc gets bred and claimed?)

I'd suggest an animation skip; the sex animation is fairly long to be locked in for a while after every hit. 

More content, for one. To be specific, perhaps the ability to attack while jumping?

Also, while it's incredibly short and bare-bones right now, I'm digging the art style! Looking forward to more. :)

As far as I've seen so far, the game seems barebones but shows a lot of promise, looking forward to the updates to the game.
Now, for suggestions, I have a few. They be listed in as levels of importance.

1. Music/Sound - causes the game to feel more welcoming and upbeat

2. Longer level - More fun exploring the world

3. Different enemies/NPCs - Adds more depth

4. More H-content - Inflation, FxF, FxM, etc. This will attract a larger crowd and bring in more supporters.

I'm not a game-dev myself, I know little about how hard it is to create a game, I do understand that it is very early into development.
I wish you the best and have high hopes for this game and you <3

Butt and/or Boob expansion. 

no futa  and also no beastiality and if you do add it maybe make a setting that turns it off and you dont see those enemies that have those h scenes

Misc:

• You could give random color palettes to enemies. This would be an easy way to create more variety and can for example be accomplished by using shaders without much effort (for color variations you could just make the sprites RGB and then exchange the initial values)

In terms of controls:

• It plays very good (fluently) for the early state it is in, which is very good.
• Depending on where you want to go, I would like to have the ability to duck, duck kick, dash, slide, air-attack, maybe climb. But as I said: It depends on where you want to go.

In terms of "content":

• I'd like to see a wolf enemy (a classic :D)
• What about dragons?
• Snakepeople (Lamia). I think I haven't seen many of those slithering around in other games.
• Anthro badgers.

I really like the artwork. Sheila looks great! And all in all (as far as I can tell, comparing it to other games) you've put some effort into the underlying programming what I really appreciate.

Game looks great so far :D . I love the art style >:) . If you want some suggestions I got some and some are obvious. :3 I will donate soon, probably by next update :0. 

=-= Things I would add as a developer =-=
- Custom/Art for health bar
- Armor or Clothes for the character
- Healing items / Throwing Items / Different weapons / Spells (Not all but Just a thought)
- Music (Most obvious) / Sound effects ( Bro can u stop? NO! >:C. Fine)
- Moving Background. Explain: If you move further toward the end the background will move. Example: Since the first stage is like a forest area the background could move to the left while you progress through the level.
- Mini map
- Add more bound to animations
- Player Icon art
- Whenever she is grabbed by an enemy the border around the screen can have a transparent color or shape
- In settings make a FPS button

=-= Things I would edit =-=
- I like the slime so far, a good Idea I thought would be to make it transparent a little (see through), maybe a jump for it too. [ Looks good either way ;) ]
- Sheila is a little floaty, a good edit might be the gravity for Sheila :D
- Add grass around the bottom of the tree or something that shows its in the ground. >:3

Other than that its pretty good and has great potential. :D have fun 

Played the new update. Since the Up arrow is jump, maybe make Down arrow go through platforms?