When I bought the game, the descriptions of the two version were pretty clear that db+ was the same levels as db but with more bonus levels. Maybe they've upda

When I bought the game, the descriptions of the two version were pretty clear that db+ was the same levels as db but with more bonus levels. Maybe they've updated that since you bought. I got db+ and was happy to see that the bonus levels progressed from symbols to letters/numbers so the last levels looked exactly like the algebra my kids will see in school. I think the game did an excellent job transitioning from the early levels that looked like many other kinds of puzzle/pattern games but evolved the symbols into more typical algebra equations in a way the kids barely notice but suddenly they're doing equations just like their math class. Very well designed IMO.