You should be fine for a handful of reasons (subway isn’t the type to send DMCA claims, the logo is modified to be not subway, it’s unlikely subway would even know that existed anyway)
However, if you want to be absolutely certain you won’t get claimed, change up the name entirely. Logo style can remain the same (as in, keeping it identical stylistically to the subway logo) however the name has to be different.
Any time I see a game that would otherwise have copyrighted content, all the brands and such are replaced with similar/identical looking bootleg names. One good example of this is Backstretch Battles where all the common brand names on liveries are slightly modified (FedEx becomes FedUp, M&Ms become N&Ns, so on and so forth)
An original idea would be shuffling up the letters for comedic value. A classic example of this is quite literally the namesake of r/sbubby
In short, it doesn’t need to really be much of a name as long as it doesn’t say Subway