It would be nice if there could be an indicator of this, as games typically make the tutorial only one level if there is no accompanying text. I tried to quit the first tutorial level that had the number "7" as a target, to see if I was doing something wrong because I couldn't figure it out, and I came upon "Exit Tutorial" and clearly didn't understand where I was as I ended up leaving the tutorial entirely. Now if I want to revisit that level, I have to start at the beginning of the tutorial again.

Additionally, in the main menu, clicking the "Level" button on the right side is also confusing; I don't know what it means.

Even the upper-right circled "+" icon to advance to each next level seems strange to me; puzzle games of this style usually use an arrow like "►" or "→" to indicate advancement to the next level, but not a "+".