Since this is an alpha build of the game (I think), my opinions will be subject to change if the game has a full release. Good pixel art (general resolution could be bigger and at 1080p, h scenes could also be bigger), can't finish the game (game crashes quite often when loading a new area and my pc can run games like GTA V and Hitman WOA, saves not functioning, no healing items and ways to regain hp), fell of the map from certain areas, the first boss's hitbox is way to small unless if I risk trading melee damage, (when getting r worded, if an enemy dies before flasing/vanishing, they'll get back up and remain invincible), when restarting a game after a game over, the people/girls you can save dissapear when they should be at their designated area and when going downhill, a lot of times you can't jump. Here's are improvements and mechanics that I wish are in the game:
Inventory system (like in other metroidvania games, weapons e.g. swords for more range and damage or more spells like buffs like hp regen or speed buff, heals or more interesting attacks, quest items cus why not, or general consumables like food or potions for hp, mp or buffs).
Chest for items to reward exploration. The mc's dash should have i frames. More attacks like a slide attack or a dive kick. Maybe add double jumps. When reacing teleporters, restore max hp and mp.
Shop system (a nice addition to the inventory system and gives more reasons to keep killing the enemies besides temporarily remove threats as they'll just respawn when returing to a previous area, there's no character level system or a boss is required to defeat to proceed).
A gallery where you can see the h scenes. A functioning save system. Settings to set the game to my preferences.
More and better story and artwork (maybe add consent h scenes or consensual non consent h scenes, also add non pixel art h scenes and let me do "stuff" with the girls I saved if I wanted to).
Tl;dr: Game got potential, could do plenty of fixes, add more h scenes and improve existing ones (it's fine if you think I asked too much and can't add everything but thx for reading my early review (especially if you read my review from a to z) and implement my suggestions as I prefer this game way more than your first game if this ones baked well).