Doors: Paradox is a puzzle game where you follow a messenger cat through a series of locked doors. There are 52 regular levels and 6 bonus levels. You have to unlock the door to clear the level. Each level has a scroll to find, and the regular levels also have to gems to collect. If you collect all the gems of one color in a chapter, you unlock the corresponding bonus level.
I thought the puzzles were generally on the easy side of enjoyable, although there were a few tougher ones thrown in as well. The levels generally get harder as the game goes on, although there are still a couple of easy levels towards the end. The puzzles had a decent amount of variety, with a couple of repeats of some of the simpler puzzles. In the last chapter, there were a couple of mini-games thrown in. There were only a couple of them and they weren't that bad, but I generally prefer regular puzzles.
Finding the collectibles was not particularly difficult. Most of the time, they came up in the course of completing the level, although you don't have to find any of them to unlock the door. There were a few times where I ended up having to go back after finishing the levels to get a collectible. You do have to restart the level from the beginning when you do this, but I never had to replay much of the puzzle to find what I was missing, so it wasn't too annoying. It tells you in the level menu what collectibles you've already found for each level, but I wish they had some way of telling you what you still needed to find while playing the level.
The doors and environments were nice-looking and I liked seeing all the different designs. The story in these types of games is usually bare-bones, but this was particularly light. The scrolls you find in each level give you a sentence, but even by the end they didn't seem to add up to a story.
There were a couple of places where I was able to skip a couple of puzzles in a level because some of the information needed in the steps I skipped was guessable with the information I already had. I had one place where a puzzle glitched, and an element ended up out of place, although it didn't stop me from completing the puzzle. The movement on some of the objects, particularly some of the doors, was weird to me.
Overall, Doors: Paradox is a relaxing puzzle game that is somewhat easy but still enjoyable. It was on par with Boxes: Lost Fragments, another game by the same developer, although I think that game was slightly stronger. 7/10