Whether or not you liked the original Kingdom Rush will determine whether or not you like its sequel.

There's nothing really different about the mechanics - there's just new, fun variants on the old theme. The tower specializations have differed (and are quite interesting) but the basic purposes are still the same. The enemies are different but the general premise is unchanged. There are new heroes, but the purpose of having a hero on the field is the same. So if you liked KR, you'll like KRF; and conversely if KR wasn't your thing, KRF is not sufficiently different that your opinion will be altered.

So, assuming you enjoyed KR, you'll find KRF an enjoyable revisit. It's got plenty of new challenges, interesting new towers, and incorporates a subsystem of certain enemies' abilities being "magical" so that you can negate them with a particular tower upgrade.

Forewarning: The final boss of the campaign is kind of BS (spoiler: it can just straight-up delete a few of your towers and there's nothing you can do to stop it) but that's mostly just going to cause you to retry the stage and adjust your strategy (namely: keep leftover money instead of spending it all on upgrades at the end of the last wave).

Whether or not you liked the original Kingdom Rush will determine whether or not you like its sequel. There's nothing really different about the mechanics - there's just new, fun variants on the old theme. The tower specializations have differed (and are quite interesting) but the basic purposes are still the same. The enemies are different but the general premise is unchanged. There are new heroes, but the purpose of having a hero on the field is the same. So if you liked KR, you'll like KRF; and conversely if KR wasn't your thing, KRF is not sufficiently different that your opinion will be altered. So, assuming you enjoyed KR, you'll find KRF an enjoyable revisit. It's got plenty of new challenges, interesting new towers, and incorporates a subsystem of certain enemies' abilities being "magical" so that you can negate them with a particular tower upgrade. Forewarning: The final boss of the campaign is kind of BS (spoiler: it can just straight-up delete a few of your towers and there's nothing you can do to stop it) but that's mostly just going to cause you to retry the stage and adjust your strategy (namely: keep leftover money instead of spending it all on upgrades at the end of the last wave).