Great job submitting and you have a cool little game here! I like how you actually need to finesse the cannon because of the balls trajectory and the reload speed, it makes the game more unique and challenging and in turn it makes upgrades feel more meaningful. I do agree with other comments here that it could use a little balancing in regards to difficulty and enemy health. One you get to a certain point it feels pretty impossible to keep up. Overall a well put together game and I like its aesthetic. Thanks for participating!

What a coincidence that we made similarly styled games! 

I like it, there is a variety of enemies and it feels good to acquire upgrades. It is impressive that you have used C++. I like the music.

My only criticism is that it could be better tuned. I found often that a very large wave of enemies would appear suddenly and I would be destroyed without a chance to fight back. If it wasn't for this, and with a bit more balancing, this could be my favourite that I've played so far gameplay-wise.

Pretty neat survival game. I like the skill involved in judging the trajectory of the cannon shots. The upgrade system is cool and gives some interesting decisions to make.

I have to agree with Colin EUMP that the enemies feel too tanky. Even the most basic enemies take multiple hits to kill with maxed out power.