Hi and thank you for your question.
I'm going to try to explain how this game came to be.
Back in January 2017 me and my friend wanted to make a game. It was my idea to make a survival island game and i got the inspiration for the game after watching a youtube video by rm2kdev. In this 2 year old video rm2kdev showed a game he made during a 10 hour livestream. I liked the idea of an survival island game, but also wanted to make my own game, and had a lot of ideas on how to make my own version of a survival island game. Yes both games are on an island, you can cut things and craft things, but the similarities pretty much ends there. Of course many of the elements in the game are the similar, but they are also similar to the elements of any other survival game, like Minecraft and so on. My game has rocks and trees. Minecraft has that too, but I don't think that makes my game a clone of Minecraft. I came up with most of the elements and items of my game myself: e.g. mice, rope and farming, different island seasons, bridges, the way the chests work, the random island generating system and many more.
After making the base of our game, my friend showed me the game that you mention Forager, and he wanted to make something like that. I disagreed, because I wanted to make my own game instead of copying the work of someone else. Shortly after my friend stopped working on the project, and I continued to work on it on my own. To this day I've actually still not played Forager, so I'm really not qualified to tell you, if my game is similar to the game in certain ways. I've just watched the video of the game, and I can see that the game has some similar elements like being on an island, being able to craft things and having an inventory, but again I think that's pretty common for any game in this genre.
Later in the progress I watches a video of the game The Forest and was also inspired by some of the elements in that game. E.g. trees respawning and being able to sleep in a tent. I think all game developers get inspired by the content they see and like, and I think that's fair. I don't think copying others' work is fair and making a clone of game is unethical if you ask me. I never wanted to make a clone or a copy. I programmed the entire game myself and made the game, in a way that I think is good for a survival game. Furthermore my game is free, so I wouldn't gain anything from copying someone's work.
I hope that answers your question. If not please tell me.