While admittedly I'm not a puzzle game person, at the very least I can recognize when a game is well-designed and cleverly thought out. I've known Patashu for a long time and I expected nothing less from the person who has always put their heart and soul into everything they do.
The game starts out simple enough - the tutorial levels are intentionally made easy so as to introduce the player to the game's mechanics and familiarize them with how they can be used to solve the game's varying puzzles. But once you pass the first four stages or so, the difficulty ramps up hard and doesn't let go - if you aren't used to having to plan out your moves well in advance you'll certainly need to here. Some of the puzzles can be fiendishly difficult, and with hundreds of levels to choose from in-game there is no shortage of content to enjoy.
The two robots that you control have different properties, which makes for some interesting interactions as you have to decide how to combine them to solve a particular puzzle. I also thought it was interesting how undoing a move with either Z or C could change exactly how a move was undone - a feature used heavily in many of the puzzles. I did find myself hitting the wrong key several times while playing, but fortunately you can bind controls in case you find the default configuration to be insufficient.
The level editor is a really nice touch, and something that I think will continue to drive engagement and interest in the game well after its launch. Patashu even included some of these fan-made levels in Entwined Time, adding to the game's already substantial content.
I did like how the Insight allowed you to reduce a level's difficulty in case you really get stuck on a particular level - without it I could see a lot of players giving up and quitting.
And of course, I need to comment on the chiptune track. I had the privilege of listening to Patashu's very first chiptune all the way back in 2012, and since then he's become an accomplished composer in his own right. The music written for this game is quite fitting for the atmosphere, and the use of the VRC6 expansion chip is tasteful and subdued enough not to feel completely in-your-face while you play. I got reminded of some of Shovel Knight's OST while listening to the songs.
All in all, fans of puzzle games will be very pleased with Entwined Time. I doubt anybody who plays this game will be disappointed!