Toree 2 on steam is $1, for that price you get several hours of content, with 8 stages, with 4 different main themings. Pizza Tower is $20. For such, you get many spectacular levels, with original mechanics, unique designs, and more.
For a quarter of Pizza Tower's price, you get this game. Something that is only 40 minutes of gameplay, no fun mechanics, and has virtually no replay value.
To claim that there is enough content for the $5 price tag is just blatantly ignorant of other games that are for sale.