I really like the game, but the amount of jank and the state of balance NEEDS to be fixed.
I also recommend working on Dark Ages (maybe even prioritize it over fixes idk) since absense of any shrooms makes aggro zombie decks really strong and unfun to play against. Simply spamming defaults and imps is way too strong, but the original versus had a lot of balance changes to accomodate that (for example the Coffee Bean cost was reduced to 25 sun, the Repeater cost was reduced to 150 sun instead of being 200)
Things that are unlike the original (PVZ2):
1. Chili Beans are supposed to straight up insta-kill stuff, not damage it
2. Endurians can only damage two zombies at a time
3. Frozen plants are not ignored by lobbers if the zombies are present on a lane - they should prioritize zombies if they are present on a lane (however maybe leave this one for now?)
4. Plants that are supposed to emanate heat are just not doing so
5. Cherry Bomb not only insta-kills gargs and but also ignores Sarcophagus' armor (his armor is basically a layer, it is not supposed to be JUST some additional hp like the Buckethead)
Balance changes I can suggest:
1. Tomb Raiser needs to cost more, not sure how much though
2. Zombie side NEEDS to have 5 targets instead of 3 like in original versus mode - otherwise not only does Zombie side require less to defend but also it can divert Plants side's attention on lanes 2 and 4 knowing it will just waste their resources
3. Maybe make the Golden Leaf cost 25 sun? I don't know if this is a good change but for now it will at least allow a bit more power against aggro decks if development is going slow
Also actual bugs I found:
1. Potato Mines SEEM to sometimes trigger from and deal damage to zombies on adjacent lanes - not sure how to recreate it tho and I should've done more testing
2. Football Mechs eat stuff while pushing, hence they can eat the Chili Bean or Endurian and be damaged by them (also that is how i found out that Chili Bean does not insta-kill - the mech did not die after eating)
There is a lot more stuff I want to write but right this moment I can't. However I can write more tomorrow.