I found a few problems with the game.
- An explanation on what some of the upgrades do would be helpful, such as what is "distans", "time to waste energy", and "energy damage"? Players are left to guess what these do and the upgrade system doesn't allow me to find out for myself quickly.
- I didn't discover until after three game overs that you lose health when you are outside the ship with no energy. You should probably point this out to the player. Also, I don't think it is such a good idea for the player's only currency to be protection against automated damage.
- An alert whenever the player is attacked would be helpful since the health indicator is so small and easily missed that you can lose a chunk of your life before realizing someone's shooting at you. However, don't just make it a audio alert, make it a visual one as well because some people might be playing with the sound off.
- The fact that you lose energy while holding it with time is not just annoying, it ruins the experience. Not only does it make it difficult to get the first few upgrades, you have to keep in mind what the player wants to do during the game. If the player wants to explore, they can't do that without going back to the ship and spending their energy or risk losing what they have. If an enemy attacks the player when they just got a little energy, they can fight it off, but not without losing energy. The upgrade which slows the process of losing energy is okay, but there are many other variables that contribute to energy loss such as movement speed (if it takes you longer to get back to the ship, you'll be losing more), bullet damage (the longer it takes you to take down the enemy, the more you lose). Lastly, this is especially annoying when you don't include a pause button in the game to stop the player from losing energy. The only place they don't lose stuff is at the ship on the upgrade screen; meaning if they want to stop and relax or they get a phone call, they need to go back to the ship to avoid losing progress or to avoid getting killed by enemies.
- I can understand having to lock the screen to play the game, but the game unlocks the mouse every time I go to the upgrade screen and I have to re-lock it in place afterwards. This is annoying.
- The process just moves too slowly with having to focus efforts on upgrading maintaining energy, then jumping and speed (to get to more energy and maintain what you have) and then to attack to deal with enemies. I'd like to cut out the first part.
- Having a sound effect when you hit an enemy would be satisfying to the player so perhaps think of adding one.
- Having more sound effects in general would also lend themselves to the game.
Overall though I like your game and the idea behind it. I really want to the explore it further, but the drawbacks are what keeps me from doing so. As far as I can tell, there are no bugs or glitches, the graphics are good, and you actually have more than one enemy design (you'd be surprised how many game creator just throw one enemy type into a game). I really hope you'll consider my suggestions. Good luck in your future in game design!
