Thanks for the feedback
Not sure if you'd be willing to rework this but it would be cool if there were different upgrades to choose at each check point, perhaps different bullet types, ones to upgrade reload rate etc. Would add a lot of replayability as well as strategy to the gameplay.
Funny because I originally had something like this in mind
I planned that player would choose from five different choices: increase character speed, increase jump height, increase bullet speed, decrease reload time and increase ammo capacity. But I decided to keep things simple and now the player receives all these five bonuses at the same time
I didn't think it was obvious how to activate the checkpoints, most of the time I was playing I was starting again each time. You should make it automatic as you walk over them. Also, it would be better if you recovered all your health at checkpoints since by dying and restarting from there you end up having full health anyway.
Checkpoint system is a bit special. I didn't want to add normal checkpoints but forcing player to start from the beginning everytime is just too cruel. In order to activate a checkpoint you have to get there six times. If you look the checkpoint platform you see it keeps count of the visits. This isn't clear to new player when he/she first couple times sees it but I hope player will eventually figure it out. Although might be that the upgrade is taking all the attention away from it.
Just figured out there is a little bug in the checkpoint system since the teleport activates one visit too early. I'll be fixing that shortly. For now the checkpoints activations are not saved when the game is closed but I intend to change this.
Other effects like particles and debris when you kill enemies would be nice.
Yes, I'll do that.
Oh and a scaled fullscreen mode would make my day!
I'll probably implement this too. I have quite wide screen myself so when I tested a simple fullscreen it looked quite flat. But I'll try to figure out a smart way to do the scaling.
Needless to say sound and music would add a lot to the game as well!
Yes, I will definitely add some retro sounds later. I've thinking about background music but I can't figure out what sort of music would fit with the game. Also eventhough I'm a decent musician, making music for an action game isn't my strength.