Hm, I like this a lot. But you scrapped the day and night idea because you say that your custom tiles are "crappy". I really think you should think that over, you graphics, from what I can tell are very nice. The only problem I see is with the tress.
Overall, they look fine, but the 2 problems I see are the top, and the trunk. The top kinda reminds me of an umbrella, and there isn't too much leaf definition in it either. Now, the trunk is a little scrawny, maybe if you made it a little bigger, or added some root detail. But, the main thing I'd focus on is the top.
Now, this is my first time seeing your game, and from what I can tell, it looks great. I love how you make the main character more involved with the story, like that fight with that grunt. I really hope to see a lot of progress in this, and I hope that you have the determination to complete this game.
Good Luck
Captain Arcane