This game has many shortcomings and I see little against it, and I am going to leave you my evaluations of a player who has been playing first against for many years.
Mainly the first problem that I see for him to be a con is his jump, the character usually does a pirouette and his jumps are quite high, in this case I find a character who if he manages to make a good jump I would be grateful, since his height It is quite low and in places that it seems that one can reach, I end up dying not to reach the area.
Another problem is the enemies, since when does a standard enemy last 2 to 3 shots against you? That only happens with those that are mechanized, not with normal soldiers or snipers.
Then the level design needs to be more worked on, since sometimes you don't know exactly which path to take, I will have died on several occasions because I didn't know if I had to jump on one platform or another.
Another thing is the distance of the enemies in front of you, why do the enemies have infinite shooting distance, but your character has a limited distance? That is very overwhelming when the enemies shoot at you without you being able to do anything, and in an area where there are many shots on screen, becomes real torture.
Another is the enemies, why can't the enemies be seen correctly? Sometimes I don't know where a grenadier is attacking me because it blends into the color of the background and it's torture to look for them. In the end it's constant trial and error. unjustifiably for this reason, it would be good if the enemies (the soldiers) had a somewhat lighter color that would make them visible without any problem as happens in the original contra, who do not camouflage themselves.
Finally, the trees, why do you put something that blocks the view if it doesn't even have a hitbox so that you can protect yourself or the enemies can't attack you? I don't know how many times I have died because hey, someone has shot while I was close to one of the trees and the shooting does not stop, when it should since it is a lot of trees.
I will follow the project to see the improvements, since I think it can improve a lot and this is the beginning, but if you are going to call it Contra, at least it has a real essence and not only in the graphic aspect which is where I generally see Contra , and perhaps in the enemies' attacks, but the rest, mechanically, is far from really resembling the NES Contra, enemies that can withstand more than one hit, limitation of shots against enemies that do not have said limitation, but you do have that limitation, evil hidden enemies that you cannot see thanks to their colors that make it difficult to identify...
In short, it is mostly a criticism that I hope will help you improve certain aspects of the game, I will follow the project to see the improvements and that it becomes more similar, apart from aesthetics.
Greetings