The only big problem is when you try to play online levels, or in any kind of way get online, the game crashes. It has a good fps, and there are a minimal amount of graphical bugs. Some invisible letters but otherwise fine. On some versions of game, the game won't load after the 'Game data save created' on another version, game loads but playing the game looks with black flickering screen Game loads, says a new save file was created then crashes. Some glitches and Bugs, but all in all playable. When in edit/create mode there is slowdown,but in playmode/10 mario challenge its fullspeed :3 I've tried about 20 times and it crashes ever time. It may be related to NSMBU content as I've never seen that loaded in the new ver. The game was perfectly stable in 1.4.1, but now in it either crashes loading title screen or after playing a few levels. Runs really smoothly with ocasional (really ocasional) 1-2 seconds freezing. Some small stutter when open or closing menus, but inside menus and levels is solid 60fps. The only thing I really could ask for is Nintendo Network access. Minor lag now and again and in menus but really very minor complaint. Fixeable by going to 10-Mario Challange or Coursebot. When the game starts, there's a black screen showing only 5% of what i was supposed to see during gameplay. I'm using the Alienware Alpha i3 and it runs at very smooth FPS. The only bug I've seen is a little black line next to coins and coins animation is a bit messed up in NSMBU. Nvidia GeForce GPU (Alienware Alpha i3 custom GPU) Minor graphical glitches sometimes appear.

Otherwise it had quite good game play, running anywhere from 55 - 60 fps. Level names are not displayed on the Course Bot. Small black slits in the map background behind coins. Coins seemed to have minor graphical glitches. It is impossible to advance past the tutorial level as I think it needs gamepad input Some sound crackles after completing levels, But 99% playable. Minor glitches, if anything else runs then the game slows down a bit. Game locks to 30FPS after the tutorial the game locks up. and the 3D models sometimes looks weird (probably without light effect) Sometimes i can hear some Sound glitches. Minor graphic (especially lighting glitches in NSMB U. After levels are loaded: constant 60 fps. Slow-downs when content is loaded/cached. Minor graphical glitches when using the SMBU skin, perfect otherwise. Game physics seem sluggish, as if Mario runs in semi-slowmotion. Some textures bug when you change mario game (example: underground textures when you are editing overworld) Random game audio plays very briefly at stage completion. Small graphical glitches in certain scenarios

Transition to 'Create Mode' from the Main Menu gets the FPS to 38 and then goes to 60. Texts are missing from various areas (mainly level names). Some text missing in certain areas, sometimes you cant enter the name for your level. Text rendering glitch, very minor audio glitches, sprites swap sometimes from the game selected (can only be fixed by restart).

Minor text rendering issues, sound glitches are infrequent Some text is missing, occasional stutter, major tearing and occasional sound glitch. Very minor audio hitching for certain sound effects. When starting a game, the controller goes crazy (Mario goes at the top right of the screen)

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