Kakuro

This game is completely broken. Two things that don't work in this game and the reason you should NOT buy it. First, every time you win a level you have to exit to the level selection and select the next level, there's no NEXT button.

The second is that doesn't matter the numbers you place, as long as don't surpass the limit value, YOU WIN. You don't need to do the math, you can place 1, 2 and 3 at any place and it works, it just works.

Here, take a look at this:
https://steamcommunity.com/id/DarkKyugara/screenshot/790864040084578276

Poorly coded (doesn't check the sum, just whether it's greater than this) and very unsatisfying layouts, i. e. when all sums have multiple combinations or the grid is divided into independed sections because there is only one cell connecting sections.

False name, this looks like Kakuro but it is just a poor imitation.
Kakuro is a puzzle using logic and maths that looks like a crossword. Through a process of elimination you can deduce which number combinations are use and how to get the single solution.
This "thing" only involves throwing combinations of number in the grid until eventually one of the multiple solutions pops up.