For your first game, this is very good. You have backgrounds, sound effects, sprite animations for the protagonist, enemies, and the environment, and a pretty solid design altogether. I haven't found any glitches. However, it is far from perfect. Here are some suggestions:
- Be sure to list all the controls in the description. Also, you didn't show the spacebar or enter key in the initial startup of the game as a possible control. Some dialogue came up and I didn't know how to get rid of it and ended up getting hit by the first monster because the dialogue box was blocking my view.
- Like the others have said, change the Ctrl and Alt keys; those who play on apple products will have trouble with this key assignment due to the Ctrl key shifting the screen as well as other problems. You could change them to the z and x key for example. You can also add the ASDW keys as alternate movement keys and assign the k and l button.
- The game lacks music. You can find plenty of songs in the Audio portal (search adventure music or something) or you can use stuff from Kevin MacLeod (royalty free music. Just be sure to give him credit).
- For advancing dialogue, make it so the spacebar or enter key, when pressed, will show all the dialogue it was going to scroll out and the next press will dismiss it and start the next string of dialogue. It gets annoying having to wait for dialogue. Also, make the font size bigger; it's hard to read.
- Include what program you used to make your game in the description. This will give the people who created the program some publicity and answer the player's question (believe me, others will want to know).
- What is the protagonist's sprite doing? It looks like he keeps opening and closing his mouth. Also, when the protagonist is falling, you can add in an animation of his cape waving as he falls.
- Now for the important part. The game doesn't offer a lot of challenge. You could literally go through the entire game without killing any of the monsters. Plus you don't offer an incentive to kill them such as the monsters dropping gold or killing them makes you stronger, etc. The most difficult part of the game was the platforming and that's only because a few levels have a bottomless pit so a single mess up will result in a restart (mind you, this isn't a complaint about the bottomless pit). However, I'm sure the difficulty will ramp up later in the game.
This is a great start for it being your first game and I can't stress that enough. I've seen people put out some pretty horrible first games. I enjoyed the fire power and I look forward to the continuation of your game or whatever project you chose to work on next. Also, if you need a voice actor for one of your games, let me know. Good luck!