Hey Hachimen,
Is this about the Speedrun version? We've had a little discussion on this in the past but I'd just like to expand on some things:
A concern of yours was the removal of the background music. I do not believe that removing the background music plays any role in giving the player an advantage. There are no audio cues in this game that would be hindered by having background music. The music may frustrate a player, but they can always mute their game.
You noted that lack of WASD controls. These have now been added.
Another point was the lack of nostalgia for Coolmaths version. The differences we have between Coolmaths and Snubby are: No ArmourGames intro, text on bottom of screen changed/removed, main menu buttons changed/removed, level select, can use spacebar to proceed through tip screens, final win screen altered, and pre-level screen text has been changed (believe level 5 is the only one. "This one is easier than your mother" changed to "mwhahaha" most likely to make it more appropriate for a website that brands itself as a "brain-training site, for everyone, where logic & thinking & math meets fun & games"). Small changes but I can see the impact it has on nostalgia. If you were shown cropped footage of Coolmaths gameplay (no top and bottom black bars), I think the nostalgia level would be on a similar level, if not indistinguishable, to Snubbyland.
The Speedrun version was built off of Coolmaths and added a timer and practice hotkeys. I am happy to document the full process of taking the Snubbyland / Coolmaths game and modifying it to the Speedrun version. No discrepancies have been found between versions and I have been able to perform the same strats on Speedrun and Snubbyland with consistent results.
I can understand how you might feel uneasy and have concerns about runs being done on a modified version of the game, and how it may diminish the achievement of a run as it was not done on the true original release. The original is the original, and when you alter that you've got something different. The differences we've seen so far are just minor graphical (text changed, menu buttons) and functionality changes (spacebar through tip screen), however the core gameplay is consistent across all versions and I would be very surprised if there are any differences.