File Size for this game is 1.4GB on Switch3,422 blocks (427.75 MB) on 3DS, and1.9GB on Wii UNow onto the review:First I want to point out that this is not the definitive/complete version of the game. Omitted are 4 Super Mario 3D World themed levels (replaced by 4 Mario Odyssey themed levels), and you don't get to replay Super Mario 3D world as Captain Toad.For the latter, in the Wii U version, if you have Super Mario 3D World save data, you can re-play selected regular levels in that game as Captain Toad (the one with backpack) so you can't jump. Instead there are ladders in certain areas of the stages. It's not as fun in my personal opinion compared to the core game, but wish they included it as additional content. Guess they omitted it since Super Mario 3D World isn't on the Switch. Maybe they'll add it on as free DLC if Super Mario 3D World is ever portedBefore we go into the list of changes (you can skip to end if you want), let's go over what's the game is about. Captain Toad Treasure Tracker is an action puzzle video game based on mini-game puzzles in Super Mario 3D World which the devs/publisher decided expand to it's own game.Basic goal of the game is to collect a Star Piece in each level. You can also collect 3 gems, and/or do secondary objectives like collect all coins in area, not get detected, only able to move blocks certain numbers of times, etc.Captain Toad can walk and run, but cannot jump (unless he lands on a spring) due to him carrying a heavy backpack.He can pull up plants from the ground, to collect coins or throwing turnips at enemies.The game makes use of touch screen/on screen cursor via motion control to manipulate platformsThe game is in a isometric view. The camera can be rotated in any direction to view the stage at different angles. You also interact with objects/switches around the level, which can reveal hidden areas containing bonus items, and ways to get to your main objective.Unlike The Adventures of Captain Toad (in Super Mario 3D world mini-games), the levels have no time limit. Instead, the game keeps track of the highest number of coins earned in each level and the time taken to complete each level in case you want to compare scores with friends.All levels are super creative and unique. Each are challenging enough that it gives you a great sense of satisfaction once you figure out/ complete a level.Story is very basic and takes a backseat to the gameplay. Captain Toad and Toadette are out treasure hunting, but as they try to get the first star a bird comes along and captures one of them. Then it's off to save the princess...I mean Toadette while collecting treasure along the way.Now onto the list of changes compared to the Wii U version (excluding stuff mentioned in the intro):1. Portability. You can now take the game anywhere and don't have to tethered to the TV/Wii U console. The levels are bit-size enough (taking ~5-10mins average to complete) making it a perfect mobile game. There are 79 stages stages to complete with multiple objectives for each one.2. No more blowing on mics to move platforms . You still have to move blocks and hit switches to traverse the map3. Two player mode. You do not play two Toads on a single map, instead the second player plays as a cursor/aim reticle to shoot enemies. This sort of defeat the purpose of most levels as you have to be stealthy in some...but for younger kids who like to bond with their parents/older siblings; it's nice to have someone cover their back. Also the cursor can be used to direct them to the solution instead of having to physically point your finger or only verbally describe to them what to do at the screen.If you plan to get the 3DS version there are less enemies on screen4. No automated gyro control in handheld mode to control the camera5. Better Graphics: You can now play 1080p when Switch is docked. 720 handheld/tabletop mode. If you plan to get the 3DS version, the graphics are not as great as the Wii U version due to hardware limitation, but if you have a 3DS (vs 2DS) you can use the 3D slider to play game in 3D.6. There's an option to zoom in-and-out for if you want the focus to be on toad or get a general view of the world.7. HD Rumble8. Amiibo Support. Pixel Toad Hunt, an extra level that was locked via Amiibo in the Wii-U version is now included (no Amiibo required). There is still Amiibo support; by tapping any amiibo you get a 1-Up Mushrooms. These are not infinite as there is a cooldown time before you can use it again.On the 3DS and Switch versions, scanning the Super Mario Odyssey amiibo will unlock the Super Mario Odyssey-themed levels early so you don't have to unlock them in-game9. No duel screens. This was an advantage in the Wii U and 3DS versions, but in the Switch version if you have it handheld mode you can use the touch screen, otherwise in TV mode you have to use the cursor/aim reticalThe core game is essentially the same as the Wii U version (minus some omissions/additions), but with some quality of life changes. If you own the Wii U version already it may not be worth it to double dip unless you think you can get more playtime due to it being a take it anywhere mobile game, or really want to play the Mario Odyssey levels. If you never owned/played the Wii U version and into action puzzle games where you have to think critically (at times) then this is a very good buy.Hope this helps you in your purchasing decision