Damn, lol chinese spam artists, not only are the sprites I recognize copied from other games, but you even place ads everywhere into the game, guess the chinese strategy is to just use whatever they can and then dissappear before anyone can sue them, and hey they are in China so suing them is akin to trying fend off a tank with a pistol.

for a bet-h'-up game this seems to be competent, but there are some bugs it seems. first, the 'W' key doesn't do anything nor the 'K' key, i tried the alternate of 'S+D,S+A' still nothing, at first the game was running fine but after a short time new monsters started to show up, ones with multicolored heath-bars and with missile attacks without a secondary attack this monsters felt a bit on the overwhelming side. but I don't wont to spend all my time talking about this flaw, I have no doubt you noticed that to, your soundtrack was composed by Diuska Ichiwatera who i love, I think he is my third favorite composer and your sprites are crisp and that is worth a lot. some of your minsters seem to have a off art style then the others but that's ok.
all and all i liked it. if you gave this game a story and some level flow like they had in the 1990 arcade games i think it would be worth my $0.50 to play a round (or $10 on steam). so do some pallishing of the game play, see what you can do to make it flow mimic: TMNT2,River City, Streets of Rage, or even Double Dragon Neon and I think it would work. as a side scroller the ARC System Works games would look cool.
thank you and have a good day.

It is a good starting point, with good, smooth graphics and different types of enemies. However, I can only get one combo to trigger and no specials to trigger, holding attack or jump makes him continue the action in a loop (holding attack makes him perform the one combo I could get him to do, and holding jump makes him jump indefinitely), the music ends abruptly and takes awhile to start back up, and it isn't clear how to continue after getting a game over.

The two things that could make this better. 1-control list and 2-camera zoomed in a bit more.
All in all its a good beat'em up.