I managed to upload the 52nd course. This uses the 2.0 Update Content.
Link's Airborne Bow Training ID: M6T-FG8-9PG
Edit from December 13th: I managed to upload a 53rd courses that uses the Dash Block and the P-Blocks from the 2.0 Update.
Dash Block run through P-Blocks ID: 3X8-KVC-W4G
Edit from December 18th: I managed to upload a Christmas Course remixed to World 1-1 from Super Mario Land.
World 1-1 Christmas Remix (Super Mario Land) ID: LWG-JHN-2RG
Edit from December 24th: I managed to upload a 55th course. You need to hit all 10 P-Switches while running to the goal.
P-Switches Dash ID: S2D-4Q1-CQG
Edit from December 25th: I managed to upload a 56th course in SMM2. This one is a course related to The Game Awards 2019 because I did seen alot of Nintendo fans weren't happy without a single 1st Party content announced and I made the course so that Mario can fix the event so that Nintendo fans will enjoy it.
Mario fixes The Game Awards 2019 ID: 0BV-V43-MLF
Edit from Jan. 1st, 2020: I managed to upload a New Year Course (it's still New Year's Day). This is the 57th course.
New Year Spike Ball Fireworks ID: SQQ-SLD-NRF
Edit from Jan. 2nd, 2020: I managed to upload a 58th course in SMM2. It's a One Screen course.
One Screen Obstacle Traps ID: BMN-JKL-2QF
Edit from Jan. 3rd, 2020: I managed to upload a 59th course in SMM2. It's an One Screen Room when you enter from the door.
The Survival Room ID: L91-SS6-F9G
Edit from Jan. 10th, 2020: I managed to upload a 60th course in SMM2. It's a 7th course from the Two Screens Pink Coins Finding series.
Two Screens Pink Coins Finding 7 ID: 23S-329-WCG
Edit from Jan. 11th, 2020: I managed to upload a 61st course in SMM2.
Find a way to beat Time! 7 ID: 2Y3-288-J2G
Edit from Jan. 18th, 2020: I managed to upload three more courses in SMM2. It's a total of 64 as of right now.
Mushroom Kingdom Bombing 2 ID: 3R8-LS1-MXG
Claw Castle Sky 4 ID: TD1-DXG-3JG
The Dark Rooms 2 ID: 31Y-D51-GVF
Edit from Feb. 10th, 2020: I managed to upload a 65th course in SMM2. It's a remix of World 1-1 Course from Super Mario Bros., but it has Earthquakes.
World 1-1 Earthquake Remix (Super Mario Bros.) ID: 39F-GCT-BXG
By the way, I'm making a course called Yoshi's HomeIsland Buffet that have Yoshi eat a lot of food. I still need sometime finishing it up making the course.
Edit from Feb. 27th, 2020: I managed to upload a 66th course in SMM2. It's a fourth course in The Two Screens Challenge series.
The Two Screens Challenge 4 ID: 0RY-B9J-JMF
Edit from Feb. 28th, 2020: I managed to upload a 67th course in SMM2. It's a fourth course in The Auto Castle series.
The Auto Castle 4 ID: 0RC-F3D-7WG
Edit from Mar. 3rd, 2020: I managed to upload a 68th course in SMM2. It's a second course in Cat Book Crawling series.
Cat Book Crawling 2 ID: N7N-DCR-WSG
Edit from Mar. 8th, 2020: I managed to finished up making the Yoshi's Homeisland Buffet course and it's now uploaded as a 69th course.
Yoshi's Homeisland Buffet ID: JPD-V2Y-8GF
Edit from March 14th, 2020: I managed to upload a 70th course. This course is related to Dr. Mario and needs to sanitize all the Coronavirus that infected the Mushroom Kingdom.
Dr. Mario wipes out Coronavirus ID: 2D5-YCK-WCG
Edit from March 17th, 2020: I managed to upload two more courses counted as 72. The 71st is an one screen room that you have to use the Thwomps to smash all the Galoombas. And the 72nd is an another Coronavirus related course that Bowser had stolen 240 toilet papers from Toadco and you have to retrieve them back to the store.
Thwomps Smash Galoombas Castle ID: JFX-QWT-XRF
Bowser Stolen 240 Toilet Papers ID: QS6-WNJ-0RG
Edit from March 28th, 2020: I managed to upload a 73rd and 74th course in SMM2, you have to use the On/Off Switch to blow up all the Bob-ombs before one of the reaches the block that a Muncher on top of the P-Switch and the other one is a sequel course to the first P-Switches dash course.
Bob-omb Switch Killer ID: H4S-4VN-6JG
P-Switches Dash 2 ID: FCS-J59-SBG
Edit from April 12th, 2020: I managed to upload three more courses as a total of 77 courses. The first one is a 5th course to the Survival Dash through Thwomps series and the other two are new courses.
Survival Dash trhough Thwomps 5 ID: RL7-9GD-DXF
Easter Yoshi Egg Hunt ID: Y9T-KS5-BQF
Lava Bubble Melt Dash ID: 19B-JK7-LXF
Edit from April 19th, 2020: I managed to upload two more courses as a total of 79 courses. The first one is a remix course of World 1-1 from Super Mario Bros. styled as a Quarantine type course that made Bowser's goons are home for Quarantine, so the Coronaviruses are taking over World 1-1 and the other one is a second The Survival Room that is less difficult than the first one.
World 1-1 Quarantine Remix (Super Mario Bros.) ID: 447-S8P-KBG
The Survival Room 2 ID: DG0-30K-4RG