This is... a bit of a mess, I can't lie. It was sort of fun for a bit, but there are a number of issues I had:
- The upgrades felt pretty underwhelming. I barely felt the effect of some of them, and some of them were the only ones worth buying for some time. Notably, the very first upgrade is good for a while, and some of the others that only give you 1% buffs each purchase are mid, and only barely make a difference later in the game once you can afford to sink a bunch of money into them (and I really don't see any reason for bullet size upgrades at all). Generally, I always prefer more expensive upgrades that have a greater effect, though maybe that's just me.
- The upgrade from the pistol to the SMG was crazy. Using the pistol at wave ~11 felt like a peashooter (and was boring, as there was basically 0 threat). Then using the SMG from that point forward felt like win-mode. There was 0 way to possibly die with it.
- The upgrades are unclear in their effect. Some of the numbers go up, such as the +n damage for the first upgrade. For example, say it was at +20. This would make it look like you should get 20 more damage from buying the upgrade, but when you do the number just goes up to +22 and you only really got 2 more damage. This is made extra confusing by the fact that in the VERY SAME upgrade, there is a +2 to your health, and it always stays at +2 and always increases your health by 2. Basically, these 2 effects work exactly the same way, but are shown differently. Not the end of the world or anything, but far more confusing than it really should be.
- There are a lot of random elements that seem "taped onto" this game that don't really fit. The P2W slot machine is kind of fun, but really doesn't seem necessary to the game, it could've just been more upgrades. Not to mention how out of the way it is, I could easily see a player missing it for their whole run, which would really suck since having the +200% damage and +100% coins plus the other buffs was huge. But I thought whatever was going on with the cards was a much bigger offender. It made little sense, there was very little for the player to actually interact with, and they rarely made much difference. Not to mention that there was no way to see what cards had already been drawn and were currently in effect.
- The shooting was mostly fine, and I appreciated the attention to detail with the gun swapping sides of the character, but this becomes problematic when the bullet comes out exactly from the gun. It introduces a bit of imprecision (which wasn't THAT big of a deal), but it also means that it is impossible to shoot a small enemy directly under you, which caused me a small issue once or twice.
- I would've appreciated more dangerous enemies - they were all slower than you, and the only ones that might've posed a threat (the shooting zombies) didn't appear until wave 50+. It might be cool to have some of the zombies be a bit faster than you to put some pressure on the player, and it could also incentivize buying the player speed upgrade, which I thought was rather underwhelming as is.
I might've had more feedback, but unfortunately the game froze for me at wave 58, only shortly after encountering the guys who shoot bullets. I suspect it might have been since I killed one of the shooting zombies on the exact frame the other ones shot, and it may have tried to spawn a bullet on a zombie that doesn't exist, but I could be totally wrong.
Either way, I really did enjoy the game. I always feel the need to apologize for levying so much criticism, but I'm sure you can understand I just want to give helpful feedback. Hope this helps!

Not bad. The endgame was a bit stale, and I'm not sure how I feel about the prestige upgrades making it harder to earn prestige currency (I opted to postpone buying said upgrades, which I believe worked out very well in my favor, but I think not buying upgrades in a game like this is not a fun mechanic). But overall I did enjoy it. Finding the synergy (even though its very clearly laid out for you) was very rewarding, and even though there is minimal user input the game felt punchy and alive. A great way to kill an hour or two.