Really cool! A few weeks? Seriously?! Would you mind letting me poke through the source? I'm new to libgdx, and even though I've read through several tutorials, I haven't found a consistently good model (GameObject, Player, Monster etc.) that I'd want to build something from. I'd really appreciate a look.

On another note; to fix the problem of the platforms not being very distinguishable from the background, may I recommend parallax-scrolling of the background? It's working wonders for me in my Java2D project. I have 3 layers of trees and things, plus the cloud-layer, and it really makes everything stand out.

Really slick looking. Finally we're beginning to see more decent stuff made in Java! It seems to be undergoing a bit of a revival of late.

Cas

Nice visuals, sound and general concept.
Also the menu fits the theme very good.

For the balancing:

I would favor being able to move in-air when jumping. This gives the player more control about the jumps.

Double-jump:  a nice way to adjust jump-height is to use a double jump feature. (player has to press a second time
while in jump upwards to gain an extra push)
Then you can decrease the normal jump height and still reach high platform.

Intro level:  make a simple introlevel explaining the mechanics and features (signposts when walking by)
But this is only a prototype of course currently.

That looks great! I think your pixel art is really good. I like it!

I have a few notes on this. Don't get me wrong, I really like the game. This is feedback.

• The controls are very fast, and it's hard to control
• The jump seems awfully high, for the speed you're carrying
• It's hard to dodge the bullets from the plants, because the platforms allow me to be hit from
  a long distance
• It's a little hard to distinguish platforms from the background. Especially hinge-bridges.
• Attacks are hard to use, because it's difficult to know when I can actually attack. There's delays
• The sheer amount of enemies, and partly their attack speed makes it really difficult to dodge attacks, and make it through the levels

Don't get me wrong though - this game looks amazing! I really like the particles, and animations and awww.

I have another Kryonet question but I dont think it's worth opening another thread.

I'm a little confused on how to design things.
Right now, if a client joins the server, instead of sending the client all the Players (the objects) I just send the players' x and y coordinates and let the client create it's own Player objects based on this information. Partially to send less data and partially because sending the whole Player object didn't seem to work 

Is this a good way of doing it? Because now I added the ability that the Players can carry objects, if now a client joins the server it doesn't get the information that one of the players is already carrying an object, since it's building its own Players based on the x and y coordinations I send to it.
Now an obvious solution to that would be, that besides sending only the x and y coordinates I also send the information what object the player is carrying.... but I can see this growing to more and more information and giving me a major headache

Feedback appreciated