added MinMoves to lvl files, added score system in game observer

assets/levels/00-deadly-obstacles.lvl

@@ -1,4 +1,5 @@
 Description: test obstacles
+MinMoves: 2
 Background: background-lila
                     
                     

assets/levels/01-friendly-obstacles.lvl

@@ -1,4 +1,5 @@
 Description: test obstacles
+MinMoves: 14
 Background: background-lila
                     
                     

assets/levels/02-start.lvl

@@ -1,4 +1,5 @@
 Description: find the fruit
+MinMoves: 7
 Background: background-lila
                     
                     

assets/levels/03-own.lvl

@@ -1,17 +1,18 @@
 Description: win
+MinMoves: 5
 Background: background-lila
                     
                     
                     
                     
      ########       
-     #v o   #       
-     #  S<# #       
+     #  o <o#       
+     #v S # #       
      # #### #       
                     
                     
      # #### #       
      #      #       
-     #>    ^#       
+     #     ^#       
      ########       
                     

assets/levels/04-mayhem.lvl

@@ -1,4 +1,5 @@
 Description: use multiple players
+MinMoves: 4
 Background: background-lila
                     
                     

assets/levels/05-space.lvl

@@ -1,4 +1,5 @@
 Description: space
+MinMoves: 3
 Background: background-lila
                     
                     

assets/loader-levels.go

@@ -11,6 +11,7 @@ import (
 	"os"
 	"path/filepath"
 	"sort"
+	"strconv"
 	"strings"
 
 	"github.com/hajimehoshi/ebiten/v2"
@@ -204,6 +205,7 @@ type RawLevel struct {
 	Description string
 	Background  *ebiten.Image
 	Data        []byte
+	MinMoves    int
 }
 
 func InitTiles() TileRegistry {
@@ -272,6 +274,7 @@ func ParseRawLevel(dir string, levelfile fs.DirEntry) RawLevel {
 	des := ""
 	background := &ebiten.Image{}
 	data := []byte{}
+	minmoves := 0
 
 	scanner := bufio.NewScanner(fd)
 	for scanner.Scan() {
@@ -292,6 +295,12 @@ func ParseRawLevel(dir string, levelfile fs.DirEntry) RawLevel {
 		case strings.Contains(line, "Description:"):
 			haveit := strings.Split(line, ": ")
 			des = haveit[1]
+		case strings.Contains(line, "MinMoves:"):
+			haveit := strings.Split(line, ": ")
+			minmoves, err = strconv.Atoi(haveit[1])
+			if err != nil {
+				log.Fatal("Failed to convert MinMoves to int: %w", err)
+			}
 		default:
 			// all other  non-empty and  non-equalsign lines  are
 			// level definition matrix data, merge thes into data
@@ -304,5 +313,6 @@ func ParseRawLevel(dir string, levelfile fs.DirEntry) RawLevel {
 		Data:        data,
 		Background:  background,
 		Description: des,
+		MinMoves:    minmoves,
 	}
 }