Art and humor is cute and the best part of both games. However, I have a lot of grudges with the actual gameplay:
1. Huge amount of places with one hit kill. Basically, if a room does not seem challenging enough - make it one-shot you and force to replay not from last standing point, but from beginning of a room (sometimes a few minutes back). I don't think forcing players be pitch-perfect and not allowing any mistakes is good design - unless we're talking about some additional challenges, more on that later.
2. If the enemy arena does not seem hard enough - add some one-shot bombs to it, and make arena essentially a sort of puzzle, instead of what combat arena is supposed to be.
3. Add unavoidable damage to the end boss fight to force people grind side areas, which are generally more "challenging". I couldn't once avoid some hits, and couldn't see any evidence that it's possible to evade them.
4. To "fix" problem of unavoidable damage, add a skill that allows you to heal to the end of one of skill trees. This means that if you decided to not put skill points to that skill tree, you're forced to grind enemy areas to get that skill - I believe it's essential for the boss fight. Almost all damage up to this point was telegraphed in a way that made me believe usually getting hurt was your fault. But the last boss breaks that rule, so you're actually forced a certain upgrade path, and that suucks.
5. Moveset of your character is not cancellable. Because of this, sometimes you feel robbed of your health, when game registered a move "right + B" when you actually pressed "up+B" and you can't dash mid-way of your move to avoid incoming attack. I believe that this also interfered a couple of times during platforming sections. I think this there's a reason most platformers (also brawlers) give you some window to cancel the move - when you're fighting against 10 enemies, a lot can happen during your attack, and you can be forced into getting damage that feels unfair.

I really wanted to like both guacamelee games, but the final boss of second game made me drop it. Would recommend only if you're some die hard fan of genre or really looking into challenge that feels sadistic at times. For most people though I think there are better metroid-style games that are much more fair and fun to play.

Art and humor is cute and the best part of both games. However, I have a lot of grudges with the actual gameplay: 1. Huge amount of places with one hit kill. Basically, if a room does not seem challenging enough - make it one-shot you and force to replay not from last standing point, but from beginning of a room (sometimes a few minutes back). I don't think forcing players be pitch-perfect and not allowing any mistakes is good design - unless we're talking about some additional challenges, more on that later. 2. If the enemy arena does not seem hard enough - add some one-shot bombs to it, and make arena essentially a sort of puzzle, instead of what combat arena is supposed to be. 3. Add unavoidable damage to the end boss fight to force people grind side areas, which are generally more "challenging". I couldn't once avoid some hits, and couldn't see any evidence that it's possible to evade them. 4. To "fix" problem of unavoidable damage, add a skill that allows you to heal to the end of one of skill trees. This means that if you decided to not put skill points to that skill tree, you're forced to grind enemy areas to get that skill - I believe it's essential for the boss fight. Almost all damage up to this point was telegraphed in a way that made me believe usually getting hurt was your fault. But the last boss breaks that rule, so you're actually forced a certain upgrade path, and that suucks. 5. Moveset of your character is not cancellable. Because of this, sometimes you feel robbed of your health, when game registered a move "right + B" when you actually pressed "up+B" and you can't dash mid-way of your move to avoid incoming attack. I believe that this also interfered a couple of times during platforming sections. I think this there's a reason most platformers (also brawlers) give you some window to cancel the move - when you're fighting against 10 enemies, a lot can happen during your attack, and you can be forced into getting damage that feels unfair. I really wanted to like both guacamelee games, but the final boss of second game made me drop it. Would recommend only if you're some die hard fan of genre or really looking into challenge that feels sadistic at times. For most people though I think there are better metroid-style games that are much more fair and fun to play.