The art is beautiful, movements are smooth (if you download the game). Interesting concept, I can see this being expanded upon if there's more creativity to it.
Music is nice, there should be sound effects for shooting and breaking.
There could be more polish on the player sprite, and add a tutorial or atleast just a text that says "Click to move" or "Right click to shoot" since I spent the first 5 minute walking around like an idiot lol.
The use of the limitation "10 seconds" is underwhelming though, not really a limitation nor a game gimmick but just a timer for enemy to spawn.
Personally I'll give it 8/10. There's alot of potential for more stuff on this game. Good job!
