These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Jerkass Woobie: The games will make you feel really bad for Pilaf and his constant failures over being unable to beat Goku and realize his dream of World Domination.
Nintendo Hard: Doing the higher levels of the survival tower alone in the sequel. Especially if you do it with Bulma who is not well equipped for tough boss battles.
Scrappy Mechanic: The first game had a setup where certain levels paired you up with Bulma who had her own AI. If you didn't save beforehand and she dies you would have to restart from the beginning of the level.
Also the first game had puzzles that involved using Goku's spinning ability to transfer elements from certain pedestals to other pedestals to open certain doors. Getting hit or touching a wall while doing this forced you to do this over again.